Here is what happens every 10, 5, 30, 90, 200 or 2 minutes: img823.imageshack.us/img823/6946/06072010j.jpg I then need to send the comp into stand-by by closing the lid and revive it. This usually works, but sometimes (1 case in 7) not just screen crashes but entire comp and I have to hard-reset it. Compaq V6065ea Turion X2 2Ghz GF Go6150 4GB Ram It happens only in Windows 7 x64. It does not happen in XP x64 or Linux x64. I tried 4 different nvidia drivers (modded and not, newest and from 2008) and drivers form Windows Update - made no difference. I reinstalled system on freshly formated drive trice, with different 7 releases. It usually happens when the CPU is barely used (but then again, it's like this most of the time). If I can't solve it, I will have to go back to XP 64 where I have to sacrifice 1GB of ram to enable hibernation and most modern antivirus programs do not work.