when playing pc games my computer suddenly switches off I have had the computer for a year and have had no trouble until now I run windows vista 64 bit 4gb RAM nvidia geforce 8800gtx graphics card quad core intel processors have updated nvidia drivers but problem continues any ideas?
Almost certainly overheating. I'm always astonished at the amount of muck that can accumulate on heatsink fins and fans in quite a short time. It is also amazing what a difference a quick cleanup will achieve. Time for the brush and the can of air.