Hello I have had this problem for a while, the computer just restarts when it wants to and usually when it is idle and I leave it and come back then the screen is black and I have to restart it. I have updating drivers and bios but nothing helps. I have tried tunring off all overclocking. I have not installed any new programs or hardware. Here latley I leave the main menu up in Team Fortress 2 and come back to see a black screen. I have ran memory tests and burn in tests and all have passed. My specs are Windows Server 2008 x64 (updated) AMD 64 X2 5200+ @3.01 Ghz 4 GB OCZ 667 MHz 2x Geforce 7800 512 MB MSI K9N SLI Platinum WD SATA3 320 GB OCZ 700W power supply I know it is nothing from overheating because I continuously monitor that. I am attatching some dump files if anyone can look at them. Thanks for whoever does.