The computer reboots spontaneously. Causes and ways to eliminate them. What should I do if my computer restarts when I turn it on? The computer reboots itself Windows 8.1

Good day dear blog readers

If you are experiencing an issue where your computer restarts or shuts down when you turn it on or while using Windows, there could be several reasons for this.

The computer reboots at boot (immediately after turning on) when there is hardware failure caused by various hardware failures.

One of the most common reasons when a computer refuses to start is processor overheating or errors in the power system. First check the temperature of the CPU and motherboard. To do this, you need to go into the computer's BIOS. To do this, press the Delete, F2, F10, Esc or other button (indicated in the description of the motherboard). In the BIOS itself, you need to find a section that displays the temperature characteristics of components. This could be the PC Health Status, Power, Advanced, H/W Monitor or other section. The temperature of the processor (CPU) should not be higher than 80-90 degrees Celsius, and the motherboard (Mother Board) should not be higher than 60-70 degrees.

The cause of overheating of the processor may be a non-functioning cooler, the presence of an abundant layer of dust, or dried out thermal paste between the processor and the cooling radiator. Open the computer system unit and thoroughly clean it from dust with the power supply turned off. To do this, use a can of compressed air and do not forget to ensure adequate ventilation. You should not use a vacuum cleaner for cleaning, as it is very easy to damage the fragile radio elements on the motherboard.

After the dust has been removed, turn on the computer with the lid open and look at the processor cooling fan. If it doesn't spin, make sure it's plugged into the power socket. With the computer turned off, check the rotation of the fan blades manually; perhaps a foreign object has gotten between the blade and the radiator, and the cooler is simply jammed. Otherwise, the cooler may require replacement; if your PC has a powerful enough power supply, then you can install an additional cooler, however, you need to be more careful here: often an illiterate calculation can lead to the fact that an additional cooler will break the air flow and cause more harm, than good.

However, if the fan is working properly, then the likely cause of overheating is poor thermal contact between the processor surface and the heatsink. Remove the heatsink from the processor and remove any remaining thermal paste on its surfaces. Apply a thin, even layer of new thermal paste to the surface of the heatsink and processor. Carefully reinstall the heatsink and check the CPU temperature in the BIOS.

Another possible behavior of the computer at startup is the appearance of error messages related to cooling or the hard drive. In case of cooling problems, the self-diagnosis system notifies the user that one of the components is overheating (usually the processor) due to insufficient heat dissipation. For example, the error "System Fan (90b)" indicates that there is an error in the operation of the fan (FAN). In this case, you should check the fan itself and, if possible, replace the thermal paste.

The appearance of an error like “Non-System disk or disk error” on the monitor screen indicates that the boot sector on the hard drive is damaged and the operating system cannot be loaded. This happens if you connect an empty (new) hard drive without an installed OS to your computer. However, if you are sure that the operating system was installed on the hard drive and it was working normally, then there is a possibility that the boot sector was damaged by viruses. To restore functionality, you can use a bootable LiveCD with an anti-virus scanner installed, for example, Dr.Web LiveCD. It is also advisable to check the hard drive for bad sectors and errors using the Victoria or MHDD utility ( / ).

Another possible reason for your computer to restart could be errors in the RAM. To test your RAM, you will need a boot disk or LiveCD flash drive with the Memtest86+ utility (Download). Go into the BIOS and change the boot order of the devices, putting the CD/DVD drive or USB port first. You can usually change settings in the BIOS on the Boot or Advanced BIOS Futures tab, depending on the manufacturer and BIOS version.

Next, we reboot (Ctrl+Alt+Delete) and boot from the LiveCD previously installed in the computer drive. To do this, you will need to press one of the keyboard keys, otherwise the computer will start booting as usual from the hard drive.

After loading the LiveCD, run the Memtest86+ utility and perform a memory test. The appearance of bad cells (highlighted with a red line) indicates that the RAM is faulty and should be replaced. It should be noted that the computer can reboot due to errors in the RAM not only at startup, but also during active work in Windows. The fact is that when an application tries to access a damaged memory cell, an automatic reboot will occur or a BSOD (blue screen of death) window will appear. .

The next reason the system fails to start may be a malfunction in the power supply itself. Lack of power to individual components of the system unit or low (high) voltage in individual power lines leads to malfunctions of the computer hardware. As a result, the computer will immediately reboot or shut down when turned on. Checking the performance of the power supply at home is problematic. But still pay attention to whether the cooling fans on it turn on or not. Perhaps the cause of the malfunction is simple overheating. For the same reason, the power supply should be cleaned of accumulated dust.

Also pay attention to the capacitors and the windings of the pulse transformers. The capacitors should not be swollen, and the windings should not show signs of overheating (burnt insulation). You should also pay attention to the capacitors on the motherboard itself. If you find swollen capacitors (barrels), contact a repair service.

You can verify that the power supply is faulty only by installing a new power supply on the computer, for example, from another computer. Repairing a cheap power supply is sometimes impractical, and in some cases it can lead to computer failure.

The condition of the equipment, including power failures, is diagnosed at the initial stage of turning on the computer by the POST system. In this case, the built-in speaker (if present and connected to the motherboard) will notify the user of problems with sound signals, listen to them:
- repeated short signals or a continuous high-pitched sound indicate an error in the operation of the power supply;
- repeating long signals indicate problems in the functioning of RAM;
- an alternating low and high tone signal indicates errors in the CPU operation.
A working computer emits one short beep when turned on.

The reason for computer failure may be the installation of a new device. In this case, the new device (hard drive, video card, RAM, or other) may conflict with other installed devices and the motherboard itself. Try temporarily disabling the new device and see how the computer behaves. If the new device is installed in a PCI-Express expansion slot, then try installing it in an adjacent slot. The same applies to RAM. When connecting an additional hard drive, you should carefully read the connection instructions and correctly set the jumpers (Master, Slave) on the power connection side. It is possible that the connected device is not supported by the motherboard at all. Review the device connectivity in the motherboard manual.

The computer restarts after loading the operating system. The reason for this behavior can be either overheating of components or software or hardware failures (RAM errors, incorrect operation of the power supply, video card, etc.).

After which it is necessary to replace the cooler (if there is a fault in it) and change the thermal paste.

Computer infections with viruses, which are very common, lead to crashes and unexpected reboots. To remove viruses, you need to update your antivirus software and perform a full scan of your computer. If the boot fails in normal mode, you should try starting Windows in safe mode. To do this, at the initial boot stage, press the F8 key and select the appropriate startup type. In Safe Mode, also update your antivirus software and run a full scan. You can also use a separate Dr.Web Cureit anti-virus scanner or a boot disk, for example, Dr.Web LiveCD ( / ).

You should also analyze the programs in Windows startup; perhaps a virus has installed itself there. To analyze system autorun, it is convenient to use the Autoruns utility, which allows you to remove malicious applications from autorun. You can also use the standard autorun management tool - msconfig. Open the Start menu and open the Run window, where you type "msconfig" and press Enter. On the "Startup" tab, uncheck all programs that you suspect.

In safe mode, you can use the rollback tool - restoring the system from a previously created restore point (provided that you use this service). Go to the Control Panel and open the "Recovery" section, then launch the recovery wizard by clicking on the "Run System Restore" button.

The reason for an unexpected computer restart may be incompatibility of drivers and software with the installed hardware. To get rid of such problems, you should install only original drivers from the official website or from the included disk. BSOD messages can help identify a software failure.

If the reboot is completed without a blue screen appearing, then it is probably disabled. Go to Control Panel and open the "System" section where you open additional system settings. On the "Advanced" tab, go to the boot and recovery options and uncheck the "Perform automatic restart" checkbox. Now, when a critical error occurs, a BSOD message will be displayed on the screen, the error code of which can be used to indicate a faulty module or program library.

Error codes can be found on the Internet or you can find solutions to similar problems on computer forums, since there can be a lot of possible sources of problems. For example, after the next update, the popular Skype program began to conflict with the webcam of an HP laptop and when the application was launched, the computer displayed a “blue screen of death”. Moreover, after installation, the program manages to register itself in autorun and the next time the system boots, the computer simply reboots. In this case, the solution to the problem may be updating the webcam drivers, or installing a previous version of the program, or completely uninstalling the software product.

Bye everyone and see you again!

Also on this topic, watch the video:

Windows 8 system does not reboot

Anyone who uses the Windows 8 operating system as a working system may encounter (sooner or later) a problem when Windows 8 does not reboot.

Are you sure that the problem is (as, indeed, often happens) in settings, programs or malicious viruses? Not always.

Did you know that Windows 8 sometimes does not reboot for one simple reason - the size of the Windows registry has exceeded 2 GB?

Everyone knows what the operating system registry is - all Windows settings and options are stored there. There is information about the installed software and about the equipment that is installed in the belly of the computer (disks, video cards). It's all about users and their personal settings. The registry is a logically arranged set of keys, subkeys with values assigned to them, which determine the order of operation and settings of Windows.

Let's return to the problem. Indeed, if you are the owner of windows 8 64-bit or windows server 2012 operating systems, and the registry size at some point exceeded the specified 2 GB, the system will refuse to restart.

Why won't Windows 8 reboot?

There are few reasons for the registry to swell to incredible proportions. The main ones are numerous users with characteristic settings, equipment installed and replaced (or constantly supplemented) on a computer. For a simple user, the situation can rarely get out of control, but if you ineptly use heavyweight programs (office packages from Microsoft, Corel, Adobe), you can utterly inflate the registry with obsolete entries.

Your windows 8 won't reboot? What to do?

After deleting, go through the list. There are probably a lot of things that you no longer use.

Now point two. Simply uninstalling the program is not enough. Launch the cleaner program. I described an example of such a program in the article. Can you choose your verified one? if there is already one.

What, windows 8 won't reboot anyway?

Problem…. But Microsoft knows about it. In general, they almost know everything about you ... But a specific patch has been released for this problem in the form of update KB2978366 . The patch will expand the boundaries of the registry exactly twice: now the maximum size of the registry should not exceed 4 GB. How it is possible to reach such latitudes is incomprehensible to the mind, however ... Up to 2 you somehow managed to do it!

Don’t know what to do if your computer reboots spontaneously? I will help you find the cause and try to give recommendations on how to eliminate them.

Cases when the computer restarts by itself are quite common and can be caused by a number of reasons. The main thing is to identify the problem in time and solve it, otherwise the computer may fail altogether.

Conventionally, two groups of reasons can be distinguished:

Malfunctions in hardware (in the system unit)
Software related issues

The computer reboots spontaneously, we are looking for the reason

Hardware

Most often, the computer reboots spontaneously due to problems with its hardware.

The most common reasons are:

CPU overheating. Most often this is due to dust that accumulates on radiators, so the system unit must be cleaned regularly, at least once a year. A low-quality cooler or improper installation can also cause the processor to overheat.

Poor performance of the fans in the processor, as a result of which it is not cooled sufficiently.
Power supply failure. Burning of the braid in the power supply of the system unit can lead to uneven voltage distribution on the motherboard. Poor contact in the power cable of the system unit, especially if the cable was often removed and inserted back into the socket, can also cause spontaneous reboots. Do not forget to check the condition of the capacitors; they should not be swollen or, on the contrary, dry. Often the power supply cannot cope with the load due to its low power. In this case, replace it with a more powerful one.
Problems with RAM. If you suspect the RAM, you need to test its operation. There are many special programs and utilities for this, for example the Memtest utility. In addition, you can try replacing the module; perhaps the reason is its malfunction.
Defects in the motherboard. Sudden reboots can be caused by microcracks on it or swollen capacitors.

Software

If everything is in order with the computer hardware, then the culprit for spontaneous reboots is a software problem. In order to localize the problem and fix it in a timely manner, it is necessary to determine when the PC malfunctions began and what this may be related to.

The main reasons in this block:

Installing new programs and drivers. Sometimes updated software is not suitable for your operating system, or was not installed correctly. In this case, you need to reinstall the program in accordance with the instructions provided. Sometimes you just need to remove an inappropriate program. For example, if you have Windows 7 and are faced with the problem of a sudden reboot, it may be enough to uninstall the Nero program and everything will fall into place.
Installing additional equipment that is not compatible with your computer. For example, you already have three hard drives and you add another video card, but the load on the power supply increases, and its power cannot cope with it. In this case, you can install a more powerful power supply or remove extra hard drives.
Outdated software. This is evidenced by the slow operation of the computer, freezing, especially after logging on to the Internet, which provokes an automatic reboot. To avoid this, you need to periodically reinstall Windows (once a year if the computer is under average load, twice if it is heavily loaded).
Problems with the hard drive or file system. Here the Victoria and Mhdd utility will come to your aid, which will test the hard drive for errors.
Viruses are also a common cause of a computer suddenly rebooting.

To prevent your computer from spontaneously rebooting, it would be a good idea to disable automatic system reboot in the settings. This is quite easy to do. Right-click on the “My Computer” shortcut and select “Properties” there, in “Advanced system settings” select “Startup and Recovery” and uncheck the box next to the line “Perform automatic restart”, click “OK”.

From all of the above, it is clear that the problem of spontaneous computer reboot is quite complex and requires careful diagnosis. Therefore, it is worth regularly preventing such problems:

update system equipment in a timely manner;
periodically clean the contents of the system unit from dust;
install new programs, strictly following the instructions;
add new equipment to your computer that is compatible with existing equipment and will not cause additional loads on the power supply.

If you cannot independently determine the reason for the computer rebooting spontaneously, or you are afraid of causing harm, it is better to seek the help of a specialist.

In contact with

Microsoft operating systems are widespread in the computer world, and the eighth version of Windows 8 is one of the newest among them. However, it is not without its shortcomings. Many users complain that Windows 8 constantly reboots, and continuous rebooting can occur during installation or during use.

Where to look for the problem

A PC is a complex electronic device. Therefore, when problems arise with its operation, it is difficult to quickly find the right solution, because:

the software may be fine, but the hardware will fail;
the hardware may be fully functional, but the software has received destructive changes, for example, due to accidental deletion of a system file or from a virus;
Your PC may be fully functional, but it is not working as it should.

In order for the user to independently fix the problem, he must have knowledge of both the hardware and software of the PC. If they are not there, it is better to contact a specialist.

How to eliminate reboots during installation

If Windows 8 starts to reboot cyclically during installation, and before installing it the computer was working normally under another OS, the following reasons are possible:

In any case, you need to open the computer and check the cleanliness of the fans and radiators. Windows 8 can load the processor and other hardware elements significantly more than the OS installed previously. Therefore, some hardware elements heat up to unacceptable temperatures and provoke cyclic re-booting.

If you need a driver

To determine the need to use a specific driver, you should:

enter the motherboard BIOS and set the default or recommended values;
after rebooting, re-enter the BIOS and disconnect all devices except one hard drive, CD drive, video adapter, keyboard and mouse;
If a new OS is installed on a laptop or other computer with limited hardware settings for disabling devices, it is better to return to the already working OS or replace the motherboard.

It is advisable that the BIOS be the latest version.

The hard drive must be the one on which the operating system is installed. If the rebooting stops and the OS installation is completed successfully, you should turn on the devices one by one in the BIOS and identify the one that provokes the reboots. Then you need to get drivers for it from the manufacturer’s website and install them.

If the cyclic reboots continue, it is best to replace the motherboard.

How to prevent reboots when the OS is running

If Windows 8 is already installed and the PC has been working with it for quite a long time, and now it starts to reboot constantly, the reason is most likely one of two:

problems with system updates;

virus infection.

Accordingly, the action plan will be as follows:

Cancel updates

Canceling an update is done by deleting it in protected mode. In the “Control Panel”, select the “Programs and Features” icon. Then we find the item “View installed updates” and set them to view in table mode - this way the date and time will be visible.

The latest updates must be removed one at a time, returning to normal OS loading. The detected update should be remembered and not installed in the future.

Removing the virus

To protect against viruses, it is best to use cloud-based antivirus programs that do not require regular updates to be downloaded to your computer. A good example would be Panda antivirus. Its free version can be found on the Internet. You will receive a reliable protector against viruses and the associated problem of cyclical rebooting of the PC.

Other measures

If the options considered do not help, then extreme measures remain:

deleting a user account. Go along the path “Control Panel” > “Administration” > “Computer Management” > “Local Users” > “Users”;

restoring the OS from backup copies, which is recommended before each update;

and as a last resort - reinstalling the operating system.

Windows 8 keeps rebooting: Video

The release of Windows 8 at one time drove many users into a stupor. Indeed, there was an embarrassment - the Start menu disappeared somewhere, and with it a lot of useful little things. For example, computer shutdown buttons. Users could not find how to turn off the computer, and all because the new Metro interface hid the treasured buttons behind Miracle panels, and these panels, as if from a fairy tale about Koshchei the Immortal, were also hidden and not displayed on the screen. A needle in an egg, an egg in a duck, a duck in a hare - this is exactly the approach used in the system to get to the treasured options for shutting down and restarting Windows 8.

Unfortunately, I can't say that the situation has changed radically in Windows 8.1. But Microsoft understands the non-obviousness of such an implementation and is working to improve the interface. Implemented for beginners, and a couple of additional nice features for advanced ones. Let's see how you can shut down or restart your Windows 8.1 computer.

Using the Wonder Panel

Miracle Bars are buttons that appear on the right side of the screen when you hover your mouse over the far upper or lower right corner of your desktop. When you place your mouse pointer at one of these corners, you will see this:

These white buttons are called "Charms bar hint". If she really annoys you,...

We click on the gear, which represents Settings, and the Miracle Panel appears on the screen. It is there that we will find the treasured button, with which you can turn off or restart Windows 8.1.

To call this panel it is very convenient to use hot keys Win+I, clicking on which opens the Miracle Panel immediately and without unnecessary delays.

Using ALT+F4 on the classic desktop

This option is as old as the world, but nevertheless relevant. While in classic desktop mode, click on any empty space on your desktop and click ALT+F4. The "Shut Down Windows" dialog will appear on the screen, which contains all available actions in the form of a drop-down list:

I love this dialogue, it is so warm, lamp-like, and reminds me of the glory days when I had Windows 2000 installed on my machine. It was a long time ago.

Using the context menu of the Start button / Win+X menu

In Windows 8.1, the Start button has returned to the taskbar. Its context menu is nothing more than the Win+X menu, also known as the "power menu". It can also be called by pressing the combination Win+X on keyboard.

In Windows 8.1, it contains the treasured options Shutdown, Reboot and Logout.

Tip: You can customize the Win+X menu to your liking. To do this, use a free utility, with its help you can add, delete or sort items in this menu.

Slide to shutdown function

This feature has been well known since the release of Windows 8.1 Preview. In my opinion, there has been too much attention paid to her online and a certain aura of mystery has been forced around her. In fact, there is nothing secret about it.

It was created for devices that support Connected Standby. This mode is something similar to how a modern smartphone turns off, with a similar model for managing the power of your device's hardware. For obvious reasons, many desktop computers do not support Connected Standby, and many tablets do.

My desktop computer is also overboard, which is not surprising: