Windows 10: How to stop my pc from restarting randomly?

My pc has been working fine for awhile up until this month. My pc will be fine for then randomly does a quick restart throughout the time of it being on. It can happen within just a few moments after logging in or up to a few hours its never certain. With my pc just restarting randomly i also never get an error popping up on my screen indicating what the issue may be, I've been stuck trying to figure it out for awhile and would really appreciate some help solving this issue.

:)

 

PC Randomly Restarting after installing new Ram!

Tried your suggestions, but still had a restart! Also ran memtest overnight (13 hours according to memtest) and had no errors! Also ran Passmark Burn in test for a couple hours testing everything and had no errors or restart. Could fitting the new ram have triggered something to go bad like my mobo or psu?

 

Internet randomly stops working on PC (works fine on other devices)

Also, I did the chkdsk C: /F /R but it didn't do anything.

It got stuck at 21% every single time and when ever I restart my PC it constantly starts scanning. Not sure how to stop it.

 

Pc keeps restarting randomly

Hello

my sons pc restarts every 2-3 days seemingly randomly, no connection to what was being done at the time.

have replaced the power supply and in the process seated all the power connections...temperatures are on the low side...even fitted a better cooler an arctic A11 just to be safe....

wonderd what the mist bvious things are t check...

someone said uninstall the graphic card and drivers and reinstall after a reboot...

not done any any troubleshooting / remedial steps yest apart from the new psu and cooler...

thanks