Is there anything else it could be? I opened up the PC and all 4 of my fans are spinning and it is relatively dust free, yet is still switching off every time the PC does anything more than just browsing the web
make sure the CPU heat sink clip didn't break on one side. I had a desktop once that had a metal heat sink clip, but it grabbed on to plastic prongs. One plastic prong broke which led to CPU overheating.
Do you have an event log in your BIOS? Perhaps that will give you the reason for shutdown.
The other thing it could be is the power supply - if you feel up to it, remove the PS, open the cover and look for bulging electrolytic capacitors. How old is the computer?
Edited by azucho98, 03 January 2015 - 05:00 PM.