I'm in the middle of playing a new game and all of a sudden it shuts down and i'm back at my desktop. I took my overclock completly off my video card. I still have my cpu (2500+) overclocked but only to 2.03 ghz. I did some tweaking with rage 3d. Should I just reformat my computer? I keep having problems with doom. Should I reset my BIOS to all defaults, if so, how?