I had to replace a motherboard in a system. Once that was done, I booted computer and the Windows splash screen appears then I get a blue screen and computer reboots (I cant read the message). This happens in Safe Mode as well. I also tried "Last Known..." I figured that I would try to do a repair install of XP Pro but set up tells me it cannot find a hard drive, yet in the BIOS its there and Windows does try to boot. This is not a like for like mobo replacement. Asus P4S800D-X for a P4P800 SE. Does anyone have any ideas?