Resolving the error “Windows could not start due to hardware configuration changes or updates. The computer turns on, but the operating system does not start: possible causes and solutions to the problem When you turn on the computer, it displays

In fact, there can be many reasons why your computer stopped turning on. We have prepared for you comprehensive material that describes the main reasons why the computer does not turn on, their description and possible actions to correct them.

We hope that this instruction will be useful to you. You can ask all questions in the comments on this page and we will try to answer them. If you cannot identify and fix the problem yourself, you can always contact us for free* diagnostics and computer repair services.

We do not bear any responsibility for any manipulations you have made with the software or hardware of your computer in accordance with these instructions and do not guarantee the restoration of the computer’s functionality. Remember that this material was prepared by specialists and computer repair work should be carried out by professionals.

The main symptoms of a computer not turning on

This part contains the main, often common symptoms of a computer not turning on, actions and the sequence of their implementation, by taking which you can bring the computer into working condition.

Basic procedure when the computer does not turn on:Check:

Is there voltage in the socket, connecting, for example, a kettle?
Is the power cord connecting the power supply and the outlet faulty?
Is the power button on the power supply turned on?
Is the computer power button pressed correctly?
Correct power supply to the computer monitor
Are the system unit and monitor connected with a connecting cord?
Open the system unit and conduct a visual inspection
Correct connection of wires inside the system unit
Disconnect all peripheral equipment and try turning it on
Install a new BIOS battery or disable it temporarily
Disconnect the video card and all other cards from the PCI slots
Reconnect the RAM sticks one by one
Leave only the motherboard, processor and power supply

Following these recommended steps may get your computer back into working order. If the above recommendations did not lead to the desired result, then a detailed clarification of the reasons for the computer’s refusal to turn on is required.

Let's look at the main reasons and symptoms why your computer won't turn on.

No voltage at the socket
Use a tester to check that the voltage in the outlet is correct or connect some other device to the outlet and check whether it will work from it.
The power cord is faulty
It's quite easy to check if your computer's power cord is faulty. You need to measure the correctness of voltage transmission on both sides with a tester or take another power cord, for example, from a monitor.
The power supply is switched off
There is a switch on the outside of the power supply. Try switching it to a different position and see if the switch is broken. On most power supplies, this switch should make a mechanical switching sound (click) when switched to another position.
BIOS battery is dead
Each motherboard has a separate firmware (BIOS) that is supported by a coin cell battery. If this battery is completely discharged, the computer may not turn on in some cases. We recommend replacing the battery with a new one.
RAM strips have moved
If there is an external impact on the system unit (shock, movement, vibration), the RAM strips may move and the computer will not turn on. We recommend disconnecting the RAM and trying to turn it on. Then connect the RAM and try to turn it on again.
The connecting cables are disconnected
Open the cover of the system unit and visually inspect for any disconnected wires. Check that the wires are securely fastened.
The component part has failed
Disconnect all additional cards from the motherboard: sound card, TV tuner, video card, Wi-Fi adapters, controllers, etc. Here you need to use the method of elimination - take out one board, try to turn it on, if when you disconnect one board the computer turns on, then that means it’s the problem.
There is a lot of dust in the computer
When a lot of dust accumulates in the system unit, this can lead to serious consequences, including failure of all components with the prospect of purchasing a new computer. If there is a lot of dust, then your computer needs cleaning.
Severe overheating of the processor and/or video card
The processor can heat up to hundreds of degrees in a few seconds. If the computer does not turn on due to the processor heating up quickly, then you need to replace the thermal paste. Also, dust could get under the processor or it could “move out” (you need to remove the dust and check that the processor is installed correctly in the socket).
The power button is broken
If the reason the computer does not turn on is a broken power button, then you can check this quite simply. Open the system unit and identify two wires running from the power button to the motherboard. These two wires will be connected with plastic connectors to the motherboard. Disconnect them and short the two contacts with something metal that allows current to pass through. Remember to take precautions when working with voltage.
It smelled like something was burning
If you smell something burning, immediately turn off the power to the computer and call a specialist. Most often, power supplies burn out. If you are confident and sure that the power supply has burned out, buy a new one and connect it.
The computer beeps and won't turn on
If a squeak is heard from the depths of the system unit, these are the so-called BIOS sound signals about the state of the computer. But what do they mean? - you ask. You can find information about what this or that signal means on our website in the section on signals and BIOS codes. By deciphering the BIOS signal, you can understand what the problem is. Detailed information about BIOS beeps and signals.
Some numbers light up on the motherboard
If the computer does not turn on, but the motherboard has BIOS status indicators in the form of a digital-alphabetic display, then from the codes issued by these displays you can find out at what stage the computer stops turning on/booting and take certain actions in accordance with this.
Peripherals are not connected correctly
There are cases when people, out of ignorance, connect peripheral equipment to the wrong connectors to which it should be connected. Because of this, the computer may not turn on. Disconnect absolutely all external devices (cameras, mice, keyboards, etc.) from the computer and try to start it.
There are smudges and swelling on the motherboard
If you measure that some part (capacitor) is swollen on the motherboard or notice strange leaks of an unknown substance, then most likely, at a minimum, you will have to replace the motherboard with a new one.
All or some fans do not turn on
Most likely the power supply or motherboard has failed. They need to be repaired or replaced with new ones. We recommend checking the connection of the wires coming from the fans to the motherboard.
The computer turns on and then turns off immediately
There are several reasons for this:
- The power supply has failed and needs to be replaced
- The processor overheats (the thermal paste needs to be replaced)
- Motherboard malfunction (repair or replace)
- Other components are faulty (diagnostics required)
The lights are on, the coolers are spinning, the computer does not turn on
Possible options for not turning on the computer in descending order of probability:
- BIOS settings are lost or the chip is faulty
- RAM fault
- Motherboard is faulty
Everything works, there is sound, but there is no image on the monitor
Check the connecting cable between the video card and the monitor, this may be the only problem. The second option is that the video card has failed. If the video card is separate, then you can try installing another video card and check. If there is also no signal with the new video card, then the monitor is most likely broken.
The computer does not turn on and a blue screen appears
The so-called blue screen of death appears due to problems in the operation of components, their malfunctions, incompatibility, dirt and problems in the operation of the Windows operating system. A blue screen appears and displays an error code by which you can determine the malfunction and, if possible, fix it.
The computer does not turn on and a black screen appears
In most cases, a black screen is evidence of a component failure. Often, when the hard drive malfunctions, this very black screen appears, and it also appears when the RAM is not working correctly and a number of system files are missing from the hard drive. In this case, diagnostics are required, as a result of which the cause of the malfunction will become clear.
The computer keeps rebooting and cannot turn on
If at some stage of loading the operating system the computer starts to reboot and the whole process repeats all over again, this may be the result of a malfunction in the operating system or a malfunction of the hard drive. You can try to restore the operating system to an earlier date. A hard drive can have two problems - physical and logical. The logical problem can be eliminated using software, while the physical problem can only be eliminated using mechanical repairs. If the hard drive is physically faulty and there is really valuable information on it, then you can restore it, but we do not recommend using such a hard drive later.
The computer does not boot and some clicking noises are heard
If you turn on the computer and the operating system does not load and you hear quiet or loud clicks inside the system unit, then the hard drive is most likely broken. As a rule, physically broken hard drives are not used after repair, since the reliability of their operation may be extremely low.
The computer does not turn on for a long time (boots)
If the computer still turns on, but the operating system takes a very long time to load, then most likely this may be evidence of logical or physical malfunctions of the hard drive, as well as evidence of a large number of errors in the operation of the operating system. In case of errors in the operation of the OS, software prevention of its operation is required. Sometimes the computer slows down due to overheating of components.

Many PC users work with Microsoft products. For example, with the corresponding operating systems. They are called Windows (English - “window”). Every year new operating systems are being developed and released. Today, users can enjoy Windows 8 and Windows 10. However, this is not the only software for the computer. There is another very successful Microsoft product. We are talking about Windows 7. The majority of users prefer to work with this software. It has a pleasant and intuitive interface, and also copes with its tasks properly. But there are exceptions. For example, there are often cases in which Windows 7 does not load. What should I do? What should the user do to bring the computer back to life? Below we will look at the reasons for failures when loading Windows, and also try to figure out how to troubleshoot the problems.

Main reasons

Windows 7 won't boot? This operating system is considered one of the most successful from Microsoft. Many users prefer it. But the operating system is very vulnerable software. Therefore, errors in its work cannot be ruled out.

Most often, problems loading the operating system are caused by:

system failures;
PC virus infection;
"cluttered" computer;
hardware damage;
incorrect software installation;
conflicting components connected to the computer.

In fact, the situation can be corrected in different ways. It all depends on the problem. If Windows 7 does not boot, the user will have to discover the reason for this behavior (fortunately, this is often easy to do) and then resolve the conflict. And only occasionally do you have to agree to extreme measures.

Download steps

First, let's try to understand exactly how the OS loads on a computer. This way the user can find out at what stage the problems occurred. This will definitely help in the future.

OSLoader. The stage that begins with starting the BIOS. That is, immediately after turning on the computer. First, the BIOS code is executed, then the main drivers are connected. They are needed to read data from the hard drive. After this, the Windows kernel is connected, as well as the registry branch.
MainPathBoot. Largest loading step. It connects all the necessary components and drivers to the operating system. Settings, options, some applications and all built-in services are loaded during MainPathBoot. This stage is displayed on the screen as a blue background with “Windows 7” written on it.
PostBoot. Activated when loading the desktop. This stage completes the download of Windows 7 and connects the remaining applications and programs.

That's all. In fact, everything is not as difficult to understand as it seems. However, you will have to figure out what to do if Windows 7 does not boot. Problems are usually detected at the MainPathBoot stage. But they also happen with PostBoot. At the OSLoader stage, errors with loading the operating system almost never occur. This step only takes a few seconds.

PC Damage

Windows 7 won't load? It is often difficult to understand what exactly happened - a hardware failure or system problems. After all, the computer can behave the same in both cases.

So, if the user thinks that some components on his computer are damaged, they will need to be replaced. Ideally, take a closer look at the behavior of the operating system. Very often, Microsoft tells the user what the problem is. For example, by displaying the “blue screen of death”. But more on that later.

After replacing the faulty parts, the error loading Windows should disappear. The following scenarios may indicate such a problem:

the same driver constantly fails on the computer;

"blue screens of death" occur;
you can hear the sounds of the operating system on the computer, but there is no picture on the screen;
sudden freezing of the Windows boot process;
turning off the computer while processing the OS boot stages.

Which of these phenomena indicate what? This will be discussed below.

Signals - pointers

Did you encounter an error loading Windows 7? Often failures are associated with hardware damage. But what should you check first? It all depends on the situation.

Previously, we provided several indicators of computer hardware damage. But what exactly do they point to? Let's try to figure this out.

So, users can focus on the following data:

driver errors - a malfunction of the device for which one or another software package is installed;
“blue screen of death” - problems with RAM (but there are exceptions);
no picture on the screen - damage to the video card;
stop OS loading - ;
power cut while the PC is booting - a problem with the power supply.

Can the listed phenomena occur when some computer components conflict? Yes. For example, if after installing a new video card the OS does not show a picture on the monitor, you should either replace the rest of the hardware or return the old video card. Fortunately, diagnosing such phenomena is easier than other problems.

Download files

Windows 7 won't boot normally? Often, users say that they encounter black screens in the early stages of loading. They say "Bootmgr is missing". Next, you are asked to press Ctrl + Alt + Del to reboot the OS. Sometimes the user may encounter a regular black screen with no text. The cursor moves across the monitor when you move the mouse, but nothing more.

This error indicates that the boot file was corrupted while the computer was running. Bootmgr is a bootloader for Windows 7 and Windows 8. It is initially hidden from users. Removing it when formatting the hard drive is problematic. Often the cause of this error is viruses.

What to do in this case? Installing Windows 7 on your computer from scratch will help. This is the simplest solution. You can try to restore the operating system, but if this technique does not help, you will have to act decisively and radically.

Registers

Windows 7 won't load? A black screen, as we have already said, either indicates problems with the video card, or highlights failures of the Windows bootloader. Sometimes when you start your PC, the system registry is not read and loaded. This is an extremely important element.

As a rule, an error is easily identified - a corresponding warning appears on the computer screen. In addition, correcting the situation will be easier than it seems. The computer will launch the recovery wizard. By following his instructions, the user will be able to fix the problem. Not always, but often this technique helps.

Recovery Wizard

But the user will not always be able to use the automatic operating system recovery wizard. Sometimes you have to call him yourself. In addition, if Windows 7 does not boot, everyone has the right to use a set of OS recovery tools.

To launch the corresponding menu, you must:

To restart a computer.
At the PC boot stage, press “F8” several times.
Select "Troubleshoot your computer."
Enter the access password.
Click on "Startup Repair".
After completing the operation, reboot the PC.

Using the menu called up, you can perform a system rollback. To do this, just select There is nothing incomprehensible or difficult about this.

Safe mode

Sometimes Windows 7 does not boot in normal mode. In this case, you will have to restore the OS. It is advisable to do this using Windows 7 Secure Boot. In addition, this mode helps restore drivers and clean the operating system.

To use Secure Boot you will need:

Turn on the computer.
Click on "F8".
Select "Safe Mode".

You can wait for the operating system to load. Shortcuts will appear on the screen on a black background. To restore the OS, just go to “Start” - “All Programs” - “Accessories” - “System Tools” - “Recovery”.

After a secure boot, the user will be able to use all Windows services. For example, the command line. It often helps get rid of some

"Blue Death"

Sometimes users are bothered by a blue screen when loading Windows 7. It's called the "blue screen of death". As we have already said, most often such an error occurs due to problems with RAM.

A blue background appears on the monitor display. It has specific error information written in white font. The user does not need most of the information. Just look at the type of error, as well as the “Technical Information” section. With their help you can understand what's going on.

Errors with the hard drive and/or its controller can be indicated by errors like:

stack_inpage_error;
data_inpage_error;
inaccessible_boot_device;
mode_exception_not_handled.

It is advisable to have a BIOS error reference book on hand. It contains a complete list of Blue Screen of Death errors. With its help, everyone will understand exactly what the problem is with downloading Windows 7. There is no need to install a new operating system. But how to bring your idea to life?

Reset BIOS

Russian Windows 7 won't load? A similar problem occurs when working with hacked software. By reinstalling it, the error will disappear.

As we have already said, the Blue Screen of Death indicates corruption in the BIOS. Resetting the settings will help correct the situation. You can do this:

Get to the motherboard and press the special jumper.
Remove the coin cell battery and insert it back. The corresponding element is located on the motherboard. It is recommended to completely replace the battery on your PC if there are BIOS problems.
Turn on the computer, press the BIOS button ("F2", "F4", "Del" and so on - it all depends on the motherboard). Go to Exit and set the pointer to Load Setup Defaults, click on the "Enter" button. Save changes.

Ready! Now the "death screen" will no longer bother the user. But what to do if the operating system still does not boot.

File recovery

In some cases, Windows 7 will not load due to damaged system files. They can be restored manually. This technique works if automatic recovery does not produce results.

To perform a manual operation, the user must:

Launch the command line in Windows 7. It is advisable to do this in safe mode.
Write: sfc/scannow /offbootdir=c:\ /offwindir=c:\Windows.
Click on "Enter".

You can wait for the computer to be scanned and the boot files to be restored. The operation usually takes a few minutes.

Re-creating a section

Is Windows 7 loading slowly? What to do if in the end this operating system does not start?

Didn't all the tips listed above help? Then you can try to recreate the boot sector. It is also recommended to rewrite the boot code.

This is done like this:

Open a command prompt in safe mode on your computer.
First enter bcdboot.exe C:\Windows and perform the operation.
Write bootrec/fixnbr and bootrec/fixboot.
Execute requests.
To restart a computer.

Ready! Now is the time to check the loading of the operating system. It is possible that the problem will go away.

Slow work

If the operating system is working in principle, the user can be offered the following acceleration methods:

disable startup programs;
scan the OS for viruses and remove all malicious files;
launch CCleaner and clean the PC registry;
clean the operating system of files and programs.

All this really helps. If the techniques are not effective, you will have to agree to reinstall Windows 7. Usually the idea requires an installation disk. In the BIOS, you need to set the hard drive to first place in the Boot section, and then, following the instructions on the screen, complete the installation.

I have long wanted to write an article on this topic, since in my work I often have to resuscitate broken computers that squeak plaintively instead of proudly shoveling tons of information and drawing ones and zeroes.

When you turn on any computer, self-diagnosis occurs, and all systems and subsystems of the personal computer are polled. At this stage, various hardware errors most often appear. Correctly diagnosing a breakdown is the key to successful treatment.

An anemicist is akin to a doctor. Before prescribing pills or pills to a patient, you need to know what to treat, since a universal method of treating a person and resuscitating a computer has not been invented, unless you count the purchase of a new computer as a recovery method.

First, you should figure out which BIOS you have in front of you. For the most part, there are only 3 companies that develop BIOSes for motherboards that have a certificate of conformity: AWARD, AMI and Phoenix. It seems that there are still some small producers, but they are not counted.

Manufacturers of motherboards independently choose which BIOS to install on a particular motherboard (probably there, like everywhere else, there is a rollback system; whoever rolls back is in trouble).

If you have a motherboard with a BIOS installed from the company AWARD, then the signals will be like this:

BIOS AWARD signal	Problem
2 short	Minor problems with the BIOS configuration, but it prompts you to enter the BIOS. If this error persists, replace the battery or remove it for 15 minutes.
3 long	The keyboard controller does not work. Restart your computer. If this does not help, then you need to replace the motherboard or use a USB keyboard.
1 long + 1 short	RAM problem. Most often it occurs because the memory stick has slipped slightly out of the connector. If this does not help, then try booting with another memory stick, borrowed from a friend.
1 long + 2 short	Problem with the video card. Pulling it out of the slot and inserting it back helps a lot. If it doesn’t help, then throw the card in the firebox and run for a new one.
1 long + 3 short	The keyboard is lost. Yes, this happens. Most likely it's a connector issue.
1 long + 9 short	Problem with the permanent memory chip. You can only reboot your computer and hope for a miracle. There is a possibility that after flashing the BIOS, if this is possible at all, the computer will work as before.
repeating short beeps	Error in the power supply. First, you should clean it from dust or carefully inspect it for swollen condensers.
repeating long beeps	The RAM is installed incorrectly somehow. I really can’t imagine how it could be installed incorrectly, but it’s worth a look.
continuous beeping	The power supply has come to an end.

If you have a motherboard that is controlled by the BIOS AMI, then you should look at this table:

BIOS AMI Signals	Problem
2 short	RAM problem. It is worth checking whether the RAM strips are installed correctly in the slots. If this does not help, then you need to replace the RAM.
3 short	There is no RAM installed at all. AMI knows whether RAM is installed or not only after polling the first 64 KB. If they are operational, then there is memory. Most likely the strips are either installed incorrectly or are not working properly.
4 short	The system timer is faulty. If further work is impossible, then the motherboard must be replaced.
5 short	Problem with the processor. The processor should be removed and inspected to ensure that the legs are intact. If after this nothing has changed with the error, then the processor needs to be replaced.
6 short	The keyboard controller does not work or does not work correctly. Either change the motherboard or use a USB keyboard.
7 short	The problem is with the motherboard. It is worth inspecting it for swollen condensers.
8 short	Error when diagnosing the video card. Inspect it for swollen capacitors. If everything looks good, then you should replace the video card.
9 short	The BIOS firmware checksum was broken. The problem is difficult to treat and it is easier to acquire a new one.
10 short	It is not possible to write to the non-volatile memory area where the BIOS is located. The problem is difficult to overcome, since you will have to update the BIOS with a special programmer.
11 short	Problem with external cache memory. The problem is no longer relevant.
1 long + any number of short	Video card problem.

In order not to overload the article with unnecessary information about Phoenix BIOS errors, I will write about it a little later. And some will probably never need it at all.

I wouldn't have posted these tables here if the site I usually looked at hadn't crashed the other day. Now, if I need to understand the reason for the music not turning on the computer, I know where I can find the transcript.

Unfortunately, sometimes you can encounter quite serious problems with turning on computers and starting operating systems, although until a certain point there were no signs of trouble. It happens that most often the computer turns on, but the operating system does not start. It is these situations that will be discussed further. Let's look at questions related to why the computer won't boot and what to do in such situations. There are several universal solutions here.

The computer turns on, but the operating system does not start: reasons

Among all the possible situations when failures occur at the loading stage, several typical cases can be identified.

There are three options:

a black screen appears;
Blue screen BSoD occurs;
The operating system starts, but cannot fully boot.

In the first case, when the computer does not start (the boot does not turn on), messages may appear on a black screen indicating physical or software problems. In the simplest case, when nothing serious happens, the system may report that, for example, the keyboard is missing (for desktop PCs). The simplest solution is to connect it and reboot.

If the computer turns on, but the boot does not start, and instead warnings about software failures or missing files appear on a black screen, there can be many reasons for this system behavior. Among them, first of all, we can highlight problems with the hard drive, damage to the operating system (accidental or intentional deletion of system components or registry entries), exposure to viruses, incorrect boot sector entries, RAM conflicts, etc. By the way, if a blue screen pops up, this mostly applies to the RAM or recently installed device drivers, which cause conflicts not at the software level, but at the physical level.

What to do if the computer does not boot and the operating system does not start for the above reasons? Depending on the situation, there are several solutions. To an uninitiated user, they may seem quite complicated, but in certain situations only they can be used to resuscitate the system. Therefore, you will have to spend both time and effort.

The computer turns on but does not boot: what to do first?

So, let's start with the simplest thing. Let's assume that a short-term technical failure has occurred in the system, for example due to incorrect shutdown or power surges.

As a rule, almost all Windows modifications used today usually automatically activate startup upon restart. If this does not happen, before starting the system you will have to use the F8 key to call up the additional boot menu (Windows 10 uses a different method).

The computer turns on, but the operating system does not start? There's no need to get upset. Here, in the simplest version, you can select the line to load the last working configuration. If everything is in order with the system components, the system will boot without problems. If this does not help, you will have to use the troubleshooting section, and sometimes even trying to boot into safe mode may be successful.

Possible viral infection

Unfortunately, viruses can also cause such situations. What to do if the computer does not turn on? Ways to solve this particular problem boil down to using a powerful one that could check for threats even before the OS itself starts.

Among the variety of anti-virus software, it is worth noting specially disk utilities that start directly from an optical media or USB device, have their own boot records and even a graphical interface like Windows. One of the most powerful tools is Kaspersky Rescue Disk. Its use can guarantee almost one hundred percent detection of viruses, even those hiding in RAM.

RAM conflicts

Now let's see what to do if the computer does not boot and instead a blue screen appears. As already mentioned, most often this indicates problems with drivers and RAM. We’re not touching the drivers yet, but let’s look at the RAM.

The proposed solution to the issue of if the computer does not boot is mainly designed for stationary PCs. In this situation, you should remove all memory sticks, and then insert them one by one and check the load. Perhaps one of them is the link that causes failures. This may occur when trims from different manufacturers are added.

If the system can somehow be loaded using the same safe mode, the RAM should immediately be checked using the Memtest86+ utility, which will help identify the true cause of the problem.

The system does not see the hard drive

Now the worst situation is when the computer does not boot. The causes and solutions may be related to the hard drive.

A hard drive can have both software and physical problems, although sometimes that’s not even the issue. The problem may be completely trivial: the user in the BIOS settings has set the priority for booting from a removable device, for example, from an optical disk, which is currently in the drive, but is not a system one. You just need to remove it and download again.

On the other hand, another problem that the computer does not start (the system does not start) may be due to the fact that the bootloader and the records of the corresponding sector are damaged. The solution to this situation will be discussed a little later. But in the simplest case, you can try to restore disk data using Recovery utilities.

Sometimes changing the settings of the primary BIOS input/output system also helps. Here you need to find the section related to setting up the hard drive, and in the SATA configuration parameters, deactivate the use of AHCI mode.

Finally, the hard drive may also have purely physical damage, and this cannot be done without outside intervention.

Using the installation disc

Many users clearly underestimate the help that the installation or system image can provide in solving problems associated with situations when the computer turns on, but the operating system does not load.

Firstly, almost any kit includes a so-called recovery console, with which you can eliminate many software failures, and secondly, you can use the command line here. This, by the way, is the most effective method. Next it will be clear how this works.

Problems with the BOOTMGR bootloader

It is believed that the most common problem when the computer turns on, but the operating system does not start, is damage to the Windows boot manager (Boot Manager). In this case, the system just writes that there is no system partition (it simply does not see the hard drive).

You can fix this problem by starting from the boot disk and going to the command line in the recovery console, to open which you press the “R” key. Next, you need to first use the check disk command and then fix (restore) boot records.

The whole sequence looks like this:

chkdsk c: /f /r;
Bootrec.exe /FixMbr;
Bootrec.exe /FixBoot.

After entering commands, punctuation marks are not placed, but the enter key is pressed. If for some reason executing these commands does not have a positive effect, you can alternatively use a complete rewrite of the boot sector, which is performed by the Bootrec.exe / RebuildBcd command. If the hard drive is not physically damaged, this should work, as they say, one hundred percent.

You can also use some third-party utilities. The most suitable program seems to be a tool called MbrFix, which is included in the Hiren’s Boot CD. After calling it, for example, for Windows 7, provided that this particular system is installed, and only on one disk (there is no partitioning), the following should be written:

MbrFix.exe /drive 0 fixmbr /win7.

This will save the user from having to make changes to boot records, and the boot will be restored.

Problems accessing the NTLDR file

When a message appears that a given component is missing from the system, a boot commit is first applied, as in the previous case.

However, if the result is not achieved, you will need to copy the original file to the root of the system partition. For example, if the drive is "C" and the drive is "E", the command would look like this:

E:\i386> copy ntldr C:\ (after copying, the system will boot without problems).

Damaged or missing HAL.dll file

If the computer turns on, but the operating system does not load in normal mode, the reason may be a damaged component HAL.dll (a corresponding notification may be displayed on the screen).

In this situation, you need to boot the system in safe mode, call the command console and write the following line in it:

C:\windows\system32\restore\rstrui.exe (then press the Enter key and restart).

Instead of a total

Here is a brief summary of everything that concerns solving the problem of the inability to start the operating system. Naturally, the issues that the cause could be low power, CMOS battery failure, loose cable connections, dust inside the system unit, or other malfunctions were not addressed here. But in software terms, the above methods work flawlessly.

Nowadays, it is difficult to imagine life without PCs; computers help, and often replace humans, perform a huge amount of varied work. However, like any other equipment, they can fail, and an error indicating the nature of the problem will be reflected on the screen.

There can be quite a lot of different problems in computers; moreover, they can be both hardware and software. The difference is that a hardware error means the failure of any computer components, that is, the motherboard, processor, etc., while a software error is associated with an error in the operation of the software. To facilitate diagnostics, computers use error codes to help a technician identify a software problem. Unfortunately, the displayed error does not guarantee that the error that it means has occurred. This is due to the fact that the occurrence of one error could be provoked by another, but in the end it will be the latter that is displayed on the screen.

For example:

a blue screen appeared, displaying a RAM error code, this error occurs as a result of the failure of the memory module, you should not immediately think that it needs to be changed, and it’s time to throw away the old module. In most cases, this error occurs due to memory overload, that is, you launched an application that requires more memory than your computer has and it will be enough to restart it for further work.

In addition to error codes, the computer can signal the user about any problems with an audible signal, this is called a “Hardware Error”. As an example, when you turn on the computer and the standard system boot, you can hear one signal, this is the so-called POST (Power-On-Self-Test), testing components before starting, one signal means that the testing of components was successful, otherwise the computer signals will report an error. Sound errors can be deciphered using the instructions from the motherboard. Or use the description on the website.

Hardware errors

Hardware errors are divided into two types, sound and text.

Sound errors

When you turn on the computer, it immediately carries out a quick diagnostic of the system and, depending on its result, produces one signal indicating that everything is in order, or a series of sound signals indicating that one or another error has occurred. As a rule, beeps indicate quite accurately that an error has occurred. But the error can be caused by a number of malfunctions and before eliminating it, it is also necessary to identify the cause that generated this error.

Identifying beeps that indicate an error

For "AMIBIOS"

For "AWARD BIOS"

Text messages

If the video system is operating in normal mode, the computer can also display text messages about hardware errors, as a rule these are either additional to audio messages or separate messages, usually notifying that a minor error has occurred.

Identifying text messages that indicate an error

Of course, these are just a few of the huge variety of codes, but very often these are the codes that indicate that an error has occurred. If problems arise with your computer, of course, the best option would be to have it diagnosed by a technician, but it is worth considering that the message that an error has occurred is not uncommon and appears quite often for many users. Of course, you shouldn’t ask a technician for help every time your computer throws an error; first, try simply rebooting it; if you still can’t turn it on, or the error occurs again and again, then feel free to seek the help of a specialist.

Software errors

Software errors are the most common; when problems arise, the computer displays one or another error. Moreover, the way the error is displayed can be different, as a rule, it is a pop-up window with a message; in most cases, the text of the message itself contains a link and an error code. It’s impossible to even say exactly how many codes a computer can display, there are a lot of them. For example, operating system errors alone can generate more than 1000 messages, while many programs have their own errors. Unfortunately, software errors are not so precise and often the real problem may be related to completely different things. However, for a professional technician, “an error code that appears says a lot,” by understanding the entire operating principle of the software and its dependence on the hardware, it is possible to hear the checksum beeps to understand what caused this error.

Hexadecimal error code

Errors in hexadecimal code are displayed on the BSOD screen, or as it is also called the “blue screen of death”, many users are very afraid of this, mistakenly believing that this means something very bad with the computer and this is a fatal error. In fact, everything is not quite like that, let's start with the fact that this is a very useful thing, this screen really notifies the user that a truly fatal system error has occurred, however, in most cases, a simple reboot of the system helps. Of course, it will be very useful to familiarize yourself with the error that appears in order to understand what it means, but in most cases, users simply restart the computer and continue to use it until the next error occurs. Often, it is the fact that users, without trying to find out the cause of the error, reset it and continue to use it, leads to more serious malfunctions.

Table of the most common errors

Error	Description of the error
0x00000001: APC INDEX MISMATCH	Internal error in OS
0x0000000A: IRQL NOT LESS OR EQUAL	Device driver error
0x00000002E: DATA BUS ERROR	RAM error
0x00000004C: FATAL UNHANDLED HARD ERROR	Fatal access error (there may be many ways this error may occur)
0x00000004D: NO PAGES AVAILABLE	Driver error
0x000000050: PAGE FAULT IN NONPAGED AREA	The RAM module is faulty
0x000000051: REGISTRY ERROR	OS registry error
0x000000073: CONFIG LIST FAILED	An error in the registry or lack of space in the main HDD partition
0x000000074: BAD SYSTEM CONFIG INFO	Error reading system files
0x00000008B: MBR CHECKSUM MISMATCH	This error is often associated with a virus infection of the computer.

If any of these errors are displayed, then in most cases the help of a specialist is necessary, since it is quite difficult to fix it yourself and in most cases, in order for the error to be completely removed, as well as all the factors that caused this error to be removed, it is necessary to format and reinstall the system.

Reasons for a computer error code

The main reason for displaying an error message is a software glitch. To understand why it happens, you need to understand more deeply the principle of computer operation. The vast majority of computers have operating systems installed; an operating system is actually a program that, interacting with all the computer hardware, ensures the operation of additional software. Additional software is what the user installs on the computer, be it games or any work programs. Many, mostly large programs, must be installed before they can be launched. When installing a program, the program files are copied to a specific folder of the operating system for further work, while it makes an entry in its registry that a certain program is located in such and such a place. After installing the program, it starts. At the time of launch, the program sends a request to the operating system to provide it with the resources necessary for normal operation, for example, a certain amount of RAM, type of memory, etc. The operating system provides the necessary resources for the program to run. But it happens that it cannot provide the required amount of certain resources, for example because the computer does not have the required amount. Then, having not received the resources for normal operation of the program, an initialization error occurs, that is, a failure to prepare to launch the program; a message may also be displayed that the checksum is in error; in fact, it is the same thing, but has a slightly different fault structure. As a result, a message is displayed on the screen that an error has occurred. This error can be reflected either by the program itself, if it provides for this, or the message is shown by the operating system. The error code depends on who displayed the error message, the operating system or the application.

In addition to the operating system, various applications (programs) generate errors; this was done mainly for the developers of this software. Almost all possible application errors are pre-provided for in the software and if any error occurs, often the program not only shows the error code, but also prompts the user to send a report about this error. This report is sent to a specific address, pre-written in the program, at this address, all errors are distributed by code, roughly speaking, distributed into folders, and software developers can see what errors and in what quantity occurred. Having identified the most frequently occurring errors, developers begin to carefully review each such report. The fact is that a program or operating system, when sending an error report, often in addition to the error itself, sends important data for the developers of this software about the user’s computer, more precisely about its characteristics. For example, if a program uses 1GB of RAM in its work, then it is important for developers to know how much RAM is on the user’s computer. And having already analyzed all the received data, programmers release a so-called “patch” for the program, thanks to which any error in the program is corrected, which ultimately leads to more stable operation of the software and prevents the occurrence of errors.

A computer error has appeared

If an error is displayed on the monitor, this does not indicate problems with the computer. In the vast majority of cases, the error is caused by applications installed on the computer; in addition to applications, for the correct operation of many programs and external devices, drivers are used, and these are essentially the same programs that often cause an initialization error. In this case, the error is resolved by installing the required driver.

Troubleshooting computer errors

In order for the error to be eliminated, a specialist conducts a complete diagnostic of the computer; this is the only way to find out the true reason for its occurrence. After identifying the cause, the malfunctioning software part is removed and replaced with another. Next, the performance is checked, as well as testing in various modes. If after carrying out restoration work and testing the error does not appear, various internal storages of the computer are checked for the remains of deleted files and deleted so that they do not cause another error in the future.

It is difficult to name the time it takes for a technician to fix an error; it depends on its type and nature. Most are fixed within a few minutes, but there are some that can take more than an hour, since the corrected error could harm the software and this also needs to be fixed. However, on average, it takes no more than an hour to eliminate the error, as well as the consequences of its operation.

conclusions

The error does not appear on its own, it is the result of processes taking place in the computer and its software; errors that appear again and again cannot be ignored, since this is ignoring the computer’s warnings and the incorrect operation of the equipment or software. Applications do not always work stably and errors that appear are extremely important for both ordinary users and developers of various software; they help check what is associated with a particular computer or software error. However, it can still be quite difficult for an ordinary user to determine a malfunction by mistake, due to the interconnection of various processes, so it is impossible to say with confidence that, having found a description of the error, this will be the problem and the error can be quite simply corrected. Quite often, in order to correct the error, as well as all the negative factors that influenced its occurrence, a complete reinstallation of the system is necessary. In this regard, if any computer error occurs, we recommend that you do not experiment with self-repair, as this can lead to more serious consequences, but contact the “ETekhnik” service center. The service center specialists have extensive experience in repairing computer equipment, as well as setting up various software; they will quickly figure out the cause of the error and fix all the problems.

Our prices

The prices of the “ETekhnik” service center are absolutely transparent, there are no markups or “surprises” for the client; after diagnostics, the technician names the exact and final price of the repair and only after approval by the client does he begin work. Thanks to a large customer base and solid material and technical equipment, the ETechnik service center offers not only high quality work, but also some of the best prices on the market. By contacting the ETechnik service center, you are turning to professionals.

It might be useful to read: