How to Fix PC Shuts Down Randomly?

By Puja Chatterjee on May 05, 2023

A PC shutting down randomly can be really annoying and frustrating for a user. It does not only interrupt the work but may also result in the loss of data and even cause damage to the computer hardware.

If you ever face this problem, which is quite a common thing to happen, especially if a system is not maintained properly, try the solutions mentioned in this article to keep your PC up and running.


Why Does the PC Shut Down Randomly?

If your PC shuts down randomly, it is mainly an indication of an issue related to the power supply due to a faulty Power Supply Unit (PSU) or electrical short.

However, the issue may also be the result of the following:

Different hardware components, when they fail, may also shut down the computer randomly. These components include the following:

Overheating of the internal hardware components of the PC is another reason for a random shutdown of the PC. This can be caused by several factors, such as:

Some specific software errors as well as the operating system may also cause the problem. You can identify it by running the computer in safe mode or performing a system check for the following:

Here are the proven fixes to the issue of a PC shutting down randomly described for you.

Ways to Fix a PC Shutting Down Randomly

How to Fix PC Shuts Down Randomly

Ideally, you should start with the simple fixes first to prevent your PC from shutting down randomly.

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This includes cleaning and changing the necessary components to improve the cooling system and changing other faulty components that are causing the issue.

You may check the power supply voltage and whether the power cord is connected correctly. Also check all cables connected to the motherboard, including SATA and IDE cables that are connected to the hard drive. Now, restart your PC and check whether the error has been fixed.

You should also try fixing the issue by:

Now, if some of the simple fixes mentioned above do not work, try the following solutions, which are explained in detail below.

Method 1: Clean and Use Fresh Thermal Compound

Ideally, keeping your computer cool is most important. Since overheating causes the PC to behave strangely and even shut down randomly, checking, cleaning, and using fresh thermal compound is one of the most feasible solutions to this issue.


Remove the CPU fan and check the thermal paste

dried thermal compound

CPU fan blades

Unclip and remove the processor

Now turn your computer on and check whether the issue is resolved.

Method 2: Creating and Changing the Key Value in the Registry

Sometimes, the set key value in the registry may also cause this issue, along with others. You will have to create new keys and change the values in order to rectify the errors.


This pc properties

System type

open the Registry Editor by typing regedit

From the Registry Editor window, click on the small arrow next to each of these folders one by one in the order mentioned below to expand them:

Now, under Microsoft, scroll down to find Windows.

nder Microsoft, scroll down to find Windows

name the New Key #1 AU



Select Modify from the drop-down menu

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Value data

Close the window and restart your computer for the changes to take effect. Finally, check whether or not the issue has been fixed.

Method 3: Disable the Fast Startup Feature

The Fast Startup feature in Windows can affect the performance of the PC and even cause it to shut down randomly. Turn it off to resolve the issue.


Power Options

Choose what the power buttons do

Change settings that are currently unavailable

Turn on fast startup

Now, check whether the issue has been resolved.

Method 4: Update All Outdated Drivers

Any outdated drivers on your system may cause a lot of problems, including shutting down the PC randomly. So, update them from the Device Manager.


Display adapters

Go to the Details tab

Right-click on the IDs and click on Copy

Also, update all other drivers manually by right-clicking on them and selecting Update driver instead of clicking on Properties as shown before. Now the issue should be resolved.

Method 5: Check the Disk Utility

Sometimes, the hard disk drive may not be working properly and cause such an issue. Check for disk utility using the error checking tool.


Local Disk

Right-click on the Check button under Error checking

Scan drive

This will take some time. Click on the Close button when the drive has been scanned successfully.

Alternatively, you can open Command Prompt as an administrator by typing cmd in the search box and hitting Enter.

Run the command CHKDSK /f /r and hit Enter.

You may also check for any software issues and rectify them by running commands, such as:

Either way, when the process is complete, reboot your PC.

Method 6: Disable Sleep Mode

Sleep Mode in Windows may also cause random shutdowns of the computer system. Disabling it may resolve the issue.


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Power & sleep

Method 7: Update BIOS

If the Basic Input Output System (BIOS) is outdated, your PC may shutdown randomly as well. So, it is better to update it.

Expert tip:

This process must be performed very carefully and should be avoided if you do not have the necessary expertise. Otherwise, it might cause irreversible damage to your PC.


Check your BIOS information by typing system information in the search box and hitting Enter.

system information

It will read the files to collect information, and when done, it will ask for confirmation – Do you wish to continue (y/n)?

Do you wish to continue

This will start updating your BIOS. Wait for the process to complete, which involves erasing the older BIOS and installing the new one.

Now, the issue of your PC shutting down randomly will be resolved.

A word of caution:

Do not interrupt the process or switch off the PC, as that will corrupt the BIOS and render your computer unusable.

Method 8: Reset the PC

Resetting the PC may sometimes also resolve the issue, especially when the other solutions cannot solve the problem.


Get started to reset the PC

Keep my files or Remove everything

How would you like to reinstall Windows

Additional settings window

Ready to reset this PC

This will start the resetting process and will restart your PC when completed, and you will be informed as shown in the image below:

Resetting this pc

Once it is done, Windows will guide you through setting up your PC with the username, password, and other elementary things.

Expert tip:

The apps and data stored on your PC may be deleted, depending on the resetting method you choose. So, it is better to back up all data before you start the process.


Hopefully, with everything explained, this article has enlightened you about the causes of your PC shutting down randomly, along with a number of fixes to the issue.

Try one or a couple of them according to your preference, convenience, and the specific situation in order to bring your system back on track.