Why do computers restart randomly? If you’ve ever had this problem, then your computer is not alone. It’s a widespread issue that can be frustrating for users and technicians alike. Fortunately, there are some things you can do to help solve the problem or at least stop it from happening as often.

We’ll discuss why PC restart randomly, how to identify the cause of the problem, and what steps you can take to prevent these restarts in the future.

There are many reasons why a computer will restart randomly—these range from malware to power issues or just plain old hardware failure. You can easily find the reason behind this issue with simple troubleshooting.

In this guide, I’ll be discussing some of the most common causes for PC suddenly restarting and how you can fix them.

How Do You Fix a Computer That Randomly Restarts Without Blue Screen Error

computer randomly restarts

Boot Into Safe Mode

There are several reasons why your computer might restart with a blue screen error. First, you should try to boot into Safe Mode and see if the random restarts persist in that environment. If they don’t, it most likely means the problem lies with Windows itself or some other program on your machine rather than hardware issues.

Safe Mode is a troubleshooting environment that loads the bare minimum of drivers and services during Startup.

To access the safe Mode, try the following steps.

  1. Go to Start Menu and Press the gear symbol on the left ribbon. It will open the Windows Settings.
  2. Scroll down and locate “Update and Security.”
  3. From there, you can select “Recovery” on the left panel.
  4. Now, press “Restart Now” on the “Advanced Startup” section.
  5. A new screen will appear. Select “Troubleshoot,” “Advanced,” and then “Startup Settings.”
  6. Now, you can press the F4 key to choose the “Safe Mode.”
  7. Restart your PC.

If the random restarts occur in Safe Mode, you will likely have a malware or driver issue. Microsoft has some great options to help with this kind of problem on Windows machines.

You can exit the safe Mode by restarting and normally booting your PC.

Rollback to Previous Windows Update Settings (If you recently updated)

If you recently installed a new Windows update and your machine randomly restarted, it may be the installation. Rollback your updates by going to “Recovery” in Settings as described above under Boot Into Safe Mode.

Or, you can go in the settings and roll back to the previous update from Windows Update Settings.

Remove Newly Installed Softwares, Programs, or Drivers

Apps and Programs in Windows Apps & Feature Settings

Sometimes, new software or driver can cause your PC to restart randomly.

If you recently installed a program before noticing the issue, it might be related and should be removed from your system. You should try removing this software and see if it works.

You may also see this problem with improperly designed drivers for hardware components on your machine. These are often identified by an exclamation mark next to their name in Device Manager.

Use the built-in Windows tool or third-party software like Driver Talent to automatically update and repair all hardware devices to update your drivers. The latter has an option for updating outdated drivers as well if you need it.

To remove programs from your PC, follow these steps.

  1. First, go to your Control Panel and select “Programs and Features.”
  2. From there, you can find your newly installed software/ program and Uninstall it.

To roll back newly installed drivers, follow these steps.

  1. First, go to your “Device Manager” by typing it in the Windows Search Bar.
  2. From there, Double-click your device with newly installed drivers.
  3. You can go to the “Drivers” tab and select Roll Back to the previous version.

Now, restart your PC after the removal is complete.

It should no longer restart randomly with any amount of frequency when using Windows in a normal mode.

Turn Off Auto Restart From Settings

The auto-restart feature can sometimes cause your computer to restart after installing new updates randomly. So you have to turn it off.

You never know if this feature in Microsoft Windows is causing your system to restart randomly without any error.

To turn off the auto-restart, follow these steps:

  1. Navigate to “This PC” or “My Computer” and right-click to select “Properties.
  2. From there, you can find “Advanced System Settings.” Click on it, and a new window will appear.
  3. Go to the “Advanced” tab there and click “Settings” below “Setup and Recovery.”
  4. There, you have to find “Automatically Restart” and check the checkbox.
  5. Click “OK” to save the settings.

Note: If you are having trouble finding the “Automatically Restart option,” you can find it below the “System Failure” area.

It is one of the problems that might cause your system to restart automatically. But, first, you have to check if this method works for you.

Scan for Virus or Malware

PC Virus Can cause pc keeps restarting randomly

Sometimes, your computer restarts randomly because it is infected with a virus or malware. You can use the built-in Windows tool to scan for viruses/malware or third-party tools like Malwarebytes or Avast Antivirus.

A virus or malware can corrupt your system files, which is why you are experiencing PC restarts. If the virus or malware cannot be removed using built-in Windows tools, it might have infected all of the essential files in your computer, and this may require a more advanced fix like reinstalling windows to get rid of them.

Update Your Drivers and Windows

If you cannot find a solution for this problem or only on specific programs, updating your drivers may solve the issue.

A screenshot of Device Manager in Windows pc suddenly restarts

It would help if you used either Windows Update or Driver Talent Pro to update all of your essential hardware components like Graphics cards and sound cards, as these can be known causes for random restarting problems in PCs where they’re not up-to-date.

In some cases, you may need to update your OS to the most recent version.

One of the most common causes for PC restarts is faulty or out-of-date drivers, so updating them should help you solve this problem.

To update your driver, follow these steps: First, go to your “Device Manager.” You can type it in the Windows Search Bar and click on it when found. Then select all devices with a yellow exclamation mark next to their name.

Right-click on each one and choose the Update Driver Software option from there. Now, wait till it is done. It’s essential that you only install drivers downloaded directly from their manufacturer’s website because otherwise, they may be infected.

Disable Fast Startup

Fast Startup is a feature in Windows that allows your computer to start up faster after shutting down.

However, it may cause the system to crash and restart randomly when closing specific programs or performing some tasks that make changes to your PC’s critical files during the shutdown.

To disable Fast Startup on your PC, follow these steps: First, you have to go to your Control Panel and find “Power Options.” You can also access it by typing “Power Options” on the Search Bar. From there, select “Choose what the power buttons do” and select the blue-colored link with “Change settings that are currently unavailable.””

You will find the “Fast Startup” option in the “Shutdown Settings” and unmark it. Then, save your changes and restart your PC to troubleshoot if the issue still precedes.

Update Your BIOS

The BIOS is an essential part of your PC, which allows it to boot. If there are any bugs or issues with the BIOS, then you may experience random restarts.

Updating your BIOS can help you solve this problem. First, go to the manufacturer’s website of your computer or Motherboard and download the latest version for free. Sometimes it is named “Flash Update,” so search with that term on Google.

Updating your BIOS version is a pretty simple process. After restarting your PC, you have to boot from the BIOS and press the F12 or Delete key to enter into “BIOS Setup Utility” mode. Then select where you downloaded the new version of BIOS and install it, then save changes and exit by selecting the OK/Exit option in the program itself.

However, the procedure may differ depending on your Motherboard’s model.

Hardware Level Solutions

Remove Any Unused Hardware Components

Finally, if you have any unused hardware components connected to your computer, try removing them and see if that fixes the problem.

Remove those extra connections if there is no reason for an external drive connected via USB cable or anything connected by wire unplugged from your PC system except mouse and keyboard. Then, take care of the hard disk and main power cable.

If you have any additional hardware components like extra RAM or a graphic card that is unnecessary for your computer, it may be causing the random restarts too. In this case, removing them will help you fix this problem if there are no other solutions to solve it right now.

A Motherboard pc reboots randomly

In addition, you should also check whether the Motherboard supports all of those corresponding parts as sometimes they do not fit together perfectly according to their specifications and then cause system instability issues, including crashes and computer randomly restarts.

Check Your RAM’s Compatibility with Motherboard

RAMs are another reason for random restarts because they may not be compatible with your Motherboard if their voltage is different than yours, which can cause them to crash during Startup due to lack of power supply on powering up.

So check whether your RAM’s voltage matches that of motherboards’ before buying any brand-new ones, as this also decreases chances for system crashes while shutting down.

Installing a RAM

To check RAM’s voltage compatibility with the Motherboard, you need to open the “BIOS Setup Utility” again after restarting your PC and press the F12 or Delete key on boot-up. You will find information about memory modules in there under each slot.

A number written in parenthesis means that module’s voltage while VDDR_SOC is for Motherboard itself, which can be found next to its model name on a sticker underneath it. Just compare both voltage numbers before buying any new RAMs for the upgrade or replacing old ones.

This also contributes significantly to solving random reboots due to incompatible voltages, causing system crashes during Startup.

Check The Temperatures of Hardware Components

Since the CPU, Graphics Card, and other hardware components are significant causes for PC restarts due to overheating issues so try checking their temperatures using appropriate software.

This will help you determine whether there is any problem with your cooling system or not and those internal parts that can cause random reboots if they get boiling while working hard on complex tasks like gaming, etc.

You can read our guide on PC Airflow Configurations to test and improve your cooling system.

If the temperature of your CPU or GPU reaches the limits, it might cause your system to restart as a precautionary measure.

So there is no need to panic in that case. Instead, check the device’s temperature regularly if you are an advanced user. You can find lots of free software for this job on Google, too, which will help determine whether overheating causes random PC restarts or not after installing them.

Blocked Airflow Diagram

If your hardware components’ temperatures do get high enough to cause system crashes due to heating up, try adding more fans under the hood through holes at your Motherboard’s rear panel. And increase its number according to how many fan connectors each component has.

Also, make sure that the power is connected to the computer before it starts. If there is no cooling, then you will have problems with your computer. Sometimes the computer will randomly reboot, or it might shut down without warning even though there are filters on all air vents, so warm air can’t escape outside.

Check Your Power Supply Unit’s Compatibility

The last cause for a PC to restart randomly is a shortage in power supply due to not being correctly compatible with your hardware components.

So check whether your PSU’s wattage rating is high enough to support all of the parts you have connected or not, as this can also contribute to system crashes while shutting down sometimes if voltage limits are passed too.

For instance, upgrading from an old 450W unit on higher-end gaming rigs, one graphics card, and two hard drives will need at least 550W more minimum according to its manufacturer recommendations.

Also, because new graphic cards tend to require much more electricity than before, so make sure their peak load requirement does not exceed the limit set by a specific brand name when it comes out of the factory; otherwise, the computer restarts randomly when you press the shutdown button.

A Power Supply Unit

Also, check whether your PSU is in good condition or not. This helps avoid random PC restarts due to power issues later on if it’s just short of working for some time after installing a replacement because old PSUs tend to get worn out over years of use and need replacing eventually, which can contribute towards the system crashes while shutting down sometimes too.

So these are the possible reasons why your PC keeps restarting randomly without any warning messages popping up even though RAMs’ voltage matches with that of the Motherboard’s during startup process under BIOS Setup Utility section whenever they were changed recently.

Also, make sure the thermal paste between the fan heatsink and CPU has been applied cleanly by taking off its cover. It will avoid overheating issues by touching it after blowing warm air on all sides of the heatsink with a compressed gas duster for PCs or an electric fan if it’s too hot to touch.


There are many ways a CPU can cause your system to restart randomly. For example, if your CPU reaches its processing limit, an error might occur, which causes the restart. In addition, if your CPU reaches its temperature limit, it can restart to avoid any heat damages.

I faced these issues quite often with my new PC builds. That is because the cooling system is not configured correctly. And, when a CPU reaches the temperature limit, it randomly crashes or restarts to avoid any hardware damage that can be caused due to overheating.

So, if you are facing the same issue, I would advise configuring your cooling system properly.

In addition to that, it is also essential that you update or upgrade your CPU drivers regularly too. Because new versions often provide better hardware support and can fix any issues related appearance of computer restarts randomly during the shutdown process in Windows due to incompatible drivers, which might be outdated at times.


As a general rule, it can get overheated when a PC works under a constant load for an excessive period. Overheating can lead to RAM damages, which in return cause random PC restarts.

This issue can be caused due to insufficient RAM or a faulty one-piece misbehaving with your system’s functions.

I was able to solve this issue on one of my builds by troubleshooting RAMs. First, I removed all of the RAM sticks. Then, I installed them back one by one and tested which one was faulty. In my case, all of the two RAM sticks were faulty, so I tried a different one, and the PC worked perfectly fine.

Final Thoughts

Computers restart randomly due to multiple reasons. But, if you know what causes the issue and how it can be resolved, you won’t face any problems with your PC in the future.

In addition, make sure you are using the latest version of BIOS, drivers, and other software. Doing so can make your system more stable and reliable too for the long run without facing any issues.

For example, the computer restarts randomly during the shutdown process in Windows due to incompatible drivers, which might be outdated at times.

Ensure that all your hardware is compatible with your build. You’ll have to troubleshoot everything if the problem still precedes. I hope this guide will stop PC reboots randomly.

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