PC over a year old. suddenly starts to restart itself whenever i tried to play any graphic intensive game.ive checked my card and seems fine but whenever it uses power like the psu test occt it shuts down and restarts immediately even before the time it will take for the psu to heat up...like immediately after 1-2 seconds.could it be a virus that restarts my pc on certain conditions? but my avast scan didnt fix anything.can u guys please help me find the cause of the problem?also i have unchecked the auto restart feature on windows 10 and memory dump to minidumps and also i have run memtest , i have updated my graphic driver and scanned my pc. if the solution is to buy a new psu i would like to try all other possible causes first before buying a new psu ^_^