MY COMPUTER AUTOMATICALLY SHUT DOWN OR RESTARTS

Many things can cause this problem. Some of them are

1. virus or malwares
2. registry errors
3. power failure
4. mother board problems
5. processor heating 

We will start with the first. As you know you need a good antivirus and anti malware softwares to remove virus. You can use any good antivirus and free malwarebites to do this

Next is registry errors. To clean this you can download free software called ccleaner. Then clear all temporary files and clean registry using this.

 If you have used any other registry cleaners or defragmented registry before, you may have to restore you pc to that point. Because the problem will be because of the changes made by that software and you can easily rectify it by restoring your pc.

Next you can check whether it is because of processor heating. To check this, you can download a small tool called core temp . run this tool , and check whether your pc is heating too much. If it is heating, then clean your CPU fans or use heat sink. Also remove your RAM , clean it and fix it again.

If all these an not rectify your problem, consult a technician and check for SMPS and motherboard problems.

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