hey guys, im new here. Im having a problem with my new system. Ill just quickly post up my system:

W3520 Oc'd to 4ghz at 1.25v
Gigabyte UD5
MSI 275GTX
Patriot ddr3 6gb 1600
WD 1tb caviar black
Win7 RC

The problem I am having is that it randomly freezes in windows, while idling. I left my comp for 10 mins, came back and it froze. It also happened while i was playing COD4 online, it just randomly rebooted. However im not sure if its a win7 problem, or a problem with my overclock. The thing is, i ran IntelBurnTest for 5 loops and it came out stable! I also ran Prime95 for 30mins (i know i should run it for a few hours) and it was still fine.

So im not sure why leaving my comp idling or playing COD4 online would cause my comp to freeze/reboot, while stressing my CPU at 100% load was fine with no issues at all.