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Windows 10 encountered an unexpected error. The computer rebooted unexpectedly or an unexpected error occurred - how to fix it? Attack of evil viruses

One of the most alarming and unpleasant signals for any user is the appearance on the screen of a system message that the computer has unexpectedly rebooted or an unexpected error has occurred. Naturally, a spontaneous restart can frighten anyone. The saddest thing is that such an error can appear in completely different situations and indicate both conflicts in the software environment and possible problems with the hardware. Next, we will consider the most typical situations in which this failure occurs, as well as the simplest methods for eliminating problems that arise.

The computer rebooted unexpectedly or an unexpected error occurred: possible reasons for the failure

As for the occurrence of problematic situations, there can be quite a lot of them. For some reason, it is believed that in most cases the appearance of a notification that the computer has unexpectedly rebooted or an unexpected error has occurred is associated solely with the computer hardware. This is not always the case, although it could be the root cause. Even when installing drivers or other software, the possibility of such a failure cannot be ruled out.

But among the main situations, several of the most common ones can be identified:

  • exposure to viruses in a running system;
  • clean installation or reinstallation of the OS;
  • mismatch between drivers or installed programs and hardware;
  • problems related to the performance of hard drives and RAM sticks.

The impact of viruses and methods of neutralizing them if the system cannot be loaded

It goes without saying that a viral effect on the OS cannot be ruled out. Many modern threats can disable any system. For example, you can even find those that focus the maximum light power at one point on the monitor, which is why it simply burns out. But this is just an example.

If the failure is really related to viruses, and it is not possible to restart the computer in normal mode or with a safe start (the error appears again), the user has no choice but to check the system for possible threats exclusively using boot utilities like Kaspersky Rescue Disk. Such programs are written to removable media (optical disks, USB devices), have their own boot entries to start even before Windows boots, and can find deeply hidden threats not only on hard drives, but also in RAM. After starting from such a disk, in order to identify all possible threats, it is better to set not the standard scan offered in the default settings, but to select all logical partitions and boot records using deep scanning.

Installing or reinstalling the system

Perhaps the most common situation is when a failure manifests itself at the system installation stage. In this case, a message is also displayed stating that the computer rebooted unexpectedly or an unexpected error occurred. Few people know how to fix this problem. The situation is aggravated by another unpleasant factor. The fact is that you can restart the computer, but in most cases the error occurs again, and during subsequent restarts it goes in cycles.

The saddest thing is that no means help, except one. When a failure message appears on the screen, the first thing you need to do is call the command console using the Shift + F10 combination and enter the registry editor (regedit) line in it.

In the registry, in the HKLM branch, through the system directory, installation and status folders, get to the ChildCompletion section, in which the setup.exe key will be shown on the right. Either through RMB or by double-clicking, you should enter the parameter editing and change its value from one to three, confirm the actions by pressing the OK button and restart the Windows installation after restarting the computer or laptop. Usually after this the problem disappears.

Possible Windows errors during the installation of drivers or user programs. What to do?

Unfortunately, a failure with a notification that the computer has unexpectedly rebooted or an unexpected error has occurred can also manifest itself in a running system, when the user independently installed drivers for some devices that do not suit them, or software that is incompatible with either the system or “ iron." The problem, although unpleasant, is solvable.

If a normal restart does not eliminate the error, you can try to restart the computer and roll back by selecting from the start menu called by pressing the F8 key, loading the last successful configuration, or try to start in safe mode, and then remove faulty drivers or programs that were installed recently and caused the OS to malfunction.

RAM conflict issues

An equally common problem is malfunctioning RAM strips. In particular, this applies to replacing them or increasing existing RAM by installing additional sticks.

In this case, you will have to remove each strip one by one and reboot the system. If a problematic strip is identified (when the system boots in normal mode), it will need to be replaced. Particular attention should be paid to the technical characteristics of the memory and motherboard. This applies to supported volume, voltage and operating frequency. In other words, in a motherboard slot designed for 2 GB, 4 GB of RAM will not work. The same applies to installing memory with support for 1600 MHz in a slot oriented only at 1066 MHz. Well, it goes without saying that the operating voltage should be taken into account.

Problems with SSD drives

Finally, the most unpleasant situation concerns SSD hard drives. For some reason, it is on them that such a glitch appears most often. Of course, at the system installation stage, you can try to delete all logical partitions or completely format the hard drive, but, as practice shows, in most cases such actions do not give the desired effect.

One solution could be to switch the operating mode when installing the system to IDE (this is a prerequisite), and use AHCI in a running system. These settings can be changed directly in the primary BIOS/UEFI I/O system.

Brief summary

If we draw a line under all of the above, we can note the fact that in most cases the error appears at the stage of system installation. Other situations are not so common. If we talk specifically about RAM and hard drives, it is better to select equipment of the same brand, for example, install both a hard drive and memory from this manufacturer on Samsung laptops. In this case, the occurrence of conflicts is eliminated almost one hundred percent.

If you have the problem “The computer restarted unexpectedly... (The computer restarted unexpectedly...)”, then you can solve it by reading this article.

I had a problem with an unexpected reboot and I couldn’t solve it for about a week and didn’t understand what was going on, because it was the first time I’d seen this. And I tried different methods. The described method helped me, but temporarily, after 2-3 reboots of Windows or installing any driver, Windows no longer loaded and gave an error.

I tried different versions of Windows, formatted my SSD drive via LiveCD, via Paragon. I did both quick and full formatting, which takes much longer than the quick one that can be done when installing Windows. I burned different bootable flash drives, tried a bunch of options, but nothing helped - after a couple of reboots, Windows would no longer boot.

To solve the problem of unexpected reboot, when this error occurs, press Shift + F10(hold the Shift key and press F10) to open the Windows console. Further type regedit and press Enter to open Registry Editor.

Next you need to go to HKEY_LOCAL_MACHINE > SYSTEM > Setup > Status > ChildCompletion. To open the folder structure, double-click first on the HKEY_LOCAL_MACHINE folder, then twice on SYSTEM, then twice on Setup.

There will be a setup.exe parameter and a value of 1 in hexadecimal.

Instead of 1, put the number 3 and click OK.

After a couple of minutes or ten minutes, Windows will install and you can continue or start working.

Why does the error “The computer restarted unexpectedly or encountered an unexpected error. Windows installation cannot continue. To install Windows, click OK to restart your computer, and then restart the installation."

In the end I understood the problem. , and later. After installing the SSD drive there were no big problems, although they always appear on my laptop, but I solve them. But after changing the RAM, an unsolvable problem appeared for about a week and no internet advice helped.

I decided to act: I took out my old 2 sticks of RAM and installed a new one. The computer worked, the memory test was normal, I tested the memory for about 2 hours and no errors. But by removing the new RAM and installing the old one, I solved the problem. I was even able to enable AHCI mode for the SSD drive and install all versions of Windows.

Therefore, if you have a problem installing Windows and receive the error “the computer rebooted unexpectedly...”, remember what you recently changed in your computer and remove it by returning the old one.

I will still order more RAM, but now I will only buy Samsung, just like I have a Samsung SSD drive and a Samsung laptop. Before that, I checked the RAM and it should have been suitable for the voltage of 1.5 Volts and megahertz and the volume supported by my motherboard. But in the end, after a long search for a solution, the problem turned out to be exactly that. It is not compatible with my laptop for some unknown reason.

But as I recently looked at the Intel website again, and in the aida 64 program, it turns out that my laptop supports a maximum of 1066 MHz, but for some reason it seemed to me earlier that it supports 1600 MHz. This is exactly what I think was my mistake. There was an incompatibility in the MegaHertz memory.

Here is a video on this topic.

Approximately the error sounds like this: “ The computer rebooted unexpectedly, or an unexpected error occurred...". It can pop up at any stage of installation of Windows 10, as well as later versions of operating systems. There are plenty of reasons for this, for example, a hardware conflict, bad BIOS firmware, viruses, problems with the hard drive or potentially dangerous programs that were installed on the PC before, and it will take a lot of time to find them. But, there is one effective method, which we recommend using immediately, and it is written about in today’s article.

The computer constantly restarts and an error appears - what should I do?

We want to say right away that when this notification appears, neither the “OK” button nor the next OS installation will help. The message will appear continuously.

It's better to do this:

  • As soon as this information is displayed, press the key combination Shift+F10;
  • In the window we enter regedit and press Enter;
  • Let's move along the path

If the above methods do not work

If the message “The computer rebooted unexpectedly or an unexpected error occurred” continues to haunt you, here are some recommendations.

  1. Scan your PC for viruses and spyware;
  2. Roll back the system to an earlier date;
  3. Uninstall programs and games that were installed before the problem;
  4. Delete the partition on the hard drive on which the OS is installed and create it again;
  5. Check the HDD for errors, sectors, etc.;
  6. Try another ISO image of Windows 10;
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The essence of the problem: When installing Windows 7 at the last stage (after an error occurs, after a blue screen appears, or after an emergency shutdown), the computer reboots cyclically and the message is displayed:

The computer restarted unexpectedly or encountered an unexpected error. Windows installation cannot continue. To install Windows, click OK to restart your computer, and then restart the installation.

in English:

The computer restarted unexpectedly or encountered an unexpected error. Windows installation cannot proceed. To install Windows click OK to restart the computer and then restart the installation.

Solution to the problem:

When this error appears, press the Shift + F10 keys on the keyboard, the command line will open, enter the regedit command, thus launching the registry editor. We are looking for the section HKLM\System\Setup\Status\ChildCompletion. There is a key in the section called setup.exe. If the key is assigned the value 1, then double-click it and change it to 3. Then close the registry editor and restart the computer

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