When I play Game my computer can randomly lock up. I notice it most in Counter-Strike, where im lucky to get 10 minutes playing time. I'm playing then suddenly my sound loops, and I get rectangles down my screen in diagonal lines. The computer totally freezes and I have to reboot. I recently installed a Geforce 4 Ti 4200, and this was when the problems started. My first geuss was heat, but the card itself wasn't hot and it sometimes happened when I'd first turn my computer on in the morning. I haven't overclocked anything either, all at stock speeds. I've tried changing drivers, used the 23.11, 21.83s, 29.42s, and the original drivers that came with my card. I checked the case and got all the IDE cables away from the cards and RAM, but still no luck. I tried reformatting, and even changed my OS to XP, but still get the lock ups. I can play Blade of Darkness for 4 hours, but not Counter-Strike for 10 minutes....really strange. Specs: Duron 750 230W PSU Eagle? Mainboard 256MB RAM PC133 20GB HD Geforce 4 Ti 4200 (Still have my old MSI Gforce 2 MX 200) XP Pro (On fat32 partition) Onboard sound Any help would be greatly appreciated.