Windows 10: Why does my Pc keep restarting randomly for no evident reason?

Temps are fine, windows isnt corrupted as far as I know. This keeps happening randomly about every 2-3 minutes. Sometimes when it restarts, itll restart multiple times before actually booting into windows. This was happening a few months back then stopped for a month and now its been doing it since about 3 weeks ago. I could be in the middle of a game and it just restarts.Event viewer system logs

:)

 

Computer randomly shuts off and restarts with Reason Code: 0x500ff

My buddy's computer keeps randomly restarting. Usually when he's playing a game. It has randomly restarted just when he's on YouTube. 
Event Viewer says:

Here is a screenshot of Event Viewer. 
I think this event was it.  He has a prebuilt cyberpower gaming PC. 
Any suggestions are good.

 

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?

 

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