How to Fix Computer turns off automatically

How to Fix Computer turns off automatically: Is your computer turning off by itself? You can’t even log in to your PC as it automatically shutdowns before you could even type the password? Well, then don’t worry as you’re among thousands of users who face this issue every year and the most probable cause of this issue is overheating of your PC. Well, the issue occurs somewhat like this:

Your PC will suddenly shut down while you’re using it, no warning, nothing. When you will try to turn it back on, it will start normally but as soon as you will get to the login screen it will again turn off automatically, just like before. Now some users get past login screen and can use their PC for few minutes but ultimately their PC also shut down again. Now it kind of just stuck in a loop and no matter how many time you restart or wait for few hours before restarting you will always get the same results, i.e your computer will turn off itself, no matter what you do.

How to Fix Computer turns off automatically

Well in cases like this users try to troubleshoot the issue by disconnecting keyboard or mouse, or starting PC in Safe Mode, etc but the outcome will be same, which is the PC will turn Off automatically. Now there are only two main reasons which can cause this sudden shutdown of your system which is either the faulty power supply or overheating issue. If a PC get over the pre-configured temperature, the system will shutdown automatically. Now, this happens in order to avoid damaging your PC, which is a failsafe. So without wasting any time let’s see How to Fix computer turns off automatically with the help of the below-listed troubleshooting guide.

How to Fix Computer turns off automatically

Make sure to create a restore point, just in case something goes wrong.

Method 1: Run CCleaner and Malwarebytes (If you can log in to Windows)

1.Download and install CCleaner & Malwarebytes.

2.Run Malwarebytes and let it scan your system for harmful files.

3.If malware is found it will automatically remove them.

4.Now run CCleaner and in the “Cleaner” section, under the Windows tab, we suggest checking the following selections to be cleaned:

ccleaner cleaner settings

5.Once you’ve made certain the proper points are checked, simply click Run Cleaner, and let CCleaner run its course.

6.To clean your system further select the Registry tab and ensure the following are checked:

registry cleaner

7.Select Scan for Issue and allow CCleaner to scan, then click Fix Selected Issues.

8.When CCleaner asks “Do you want backup changes to the registry?” select Yes.

9.Once your backup has completed, select Fix All Selected Issues.

10.Restart your PC to save changes and see if you’re able to Fix Computer turns off automatically.

Method 2: Turn Off Fast Startup

1.Press Windows Key + R then type control and hit Enter to open Control Panel.

control pannel

2.Click on Hardware and Sound then click on Power Options.

power options in control panel

3.Then from the left window pane select “Choose what the power buttons do.

choose what the power buttons do usb not recognized fix

4.Now click on “Change settings that are currently unavailable.

change settings that are currently unavailable

5.Uncheck “Turn on fast startup” and click on Save changes.

Uncheck Turn on fast startup

Method 3: Issue with operating system

It’s possible that the issue is with your operating system rather than the hardware. And in order to verify if this is the case then you need to Power ON your PC and then Enter BIOS setup. Now once inside BIOS, let your computer sit idle and see if it shut down automatically as before. If your PC doesn’t shut down then this means your operating system is corrupt and you need to reinstall it. See here how to repair install Windows 10 in order to Fix Computer turns off automatically.

Method 4: Detecting Overheating Issue

Now you need to verify if the issue is merely caused by overheating or it is the faulty power supply and in order to that, you need to measure the temperature of your PC. One of the freeware to do this is Speed Fan.

Detecting Overheating Issue

Download and run the Speed Fan application. Then check whether the computer is overheating or not. Check whether the temperature is within the defined range or is it above them. Now if your Temperature reading are way above normal then this means it’s a case of overheating. Follow the next method in order to solve the overheating issue.

Method 5: Cleaning the dust

Note: If you’re a novice user then don’t do this yourself, look for professionals who can clean your PC or laptop for dust. It’s better to take your PC or laptop to the service center where they would do this for you. Also opening the PC case or laptop can void the warranty, so continue at your own risk.

Cleaning the dust

Make sure to clean dust settled on Power Supply, Motherboard, RAM, air vents, hard disk and most importantly on Heat Sink. The best way to do this is to use a blower but make sure to set its capacity to the minimum or you will damage your system. Don’t use cloth or any other hard material to clean the dust. You could also use a brush to clean dust from your PC. After cleaning the dust see if you’re able to Fix Computer turns off automatically issue, if not then continue to next method.

If possible see if the heatsink work while your PC powers ON if the heatsink doesn’t work then you need to replace it. Also, make sure to remove the Fan from your motherboard and then clean it using a brush. Also, if you use a laptop it would be a good idea to buy a cooler for the laptop which will allow heat to pass from laptop easily.

Method 6: Faulty Power Supply

First, of all check, if there is dust settled on Power Supply. Now if this is the case try to clean all the dust on the power supply and then clean the fan of the power supply. If possible try to turn ON your PC and see if the power supply unit work and also check if the fan of the power supply is working.

Faulty Power Supply

Sometimes a loose or faulty cable can also be the problem. So replace the cable which connects power supply unit (PSU) to the motherboard and check if this fixes the issue. But if your computer still turns off automatically without any warning then you need to replace the whole Power Supply Unit. While purchasing new power supply unit make sure to check it’s ratings against the recommended ratings by your computer manufacturer. See if you’re able to Fix Computer turns off automatically issue after replacing the Power Supply.

If you have recently installed any new hardware component then it causes this issue where your Computer turns off automatically. Now even if you haven’t added any new hardware, any failing hardware component can also cause this error. So make sure to run system diagnostic test and see if everything is working as expected.


That’s it you have successfully learned How to Fix Computer turns off automatically issue but if you still have any queries regarding this guide then feel free to ask them in the comment’s section.

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