Hi guys, Trying to install windows 7 x64 for a few weeks now. Clean install using 64 bit retail version. Formatted the drive but after a few minutes after "starting up services" the computer restarts and an error message pops up. ....computer restarted unexpectedly... Underclocked the 8 gb mem stick. tried only with 2 gb mem stick and still doesn't work. Nothing externally attached, just 1 hard drive, ATI 4650 card, DVD Rom. Already did a memtest way back. I have 4 pcs 2 gb stick, swapped, and tried on different slots. 32 bit works though. Don't know what the problem is. tried looking at the setup log at the panther directory but couldn't understand a thing. Maybe it's a 64 bit problem. Motherboard: Asus P5K-E Wifi VC: Palit Sonic 4850 256mb PSU:HEC 700 watts HD: 80 GB sata Processor: Intel Q6600 Nothing overclocked Tried to install from a flash drive with the same results. Also tried different images, last install was from msdn technet with still the same problem.