Err - computer randomly just stopping?
Whenver I'm playing a game - or anything that requires any great effort from my computer, it will - err, just stop. Not crash - the power will go completley and it will instantly switch off. When I put my hand on the back of my computer it's hot - and if I try to switch it on again, it will do the same thing as soon as the windows logo would be up. After it's cooled down, it's fine - until the next time, when it happens again.
Like I said, I think it's a cooling problem but I can't be sure. Is there a way I can determine this, and if so, is there a way I can stop it?