I tried replacing my mb and cpu, but I still cannot get into windows. The boot process goes fine until right before the Windows loading screen where the screen is black and a bar runs across to the right. A blue error screen comes up for about 0.0001 seconds and then the computer reboots. Safe mode brings the same result, stopping at the driver mup.sys (which I have) and blue screen - reboot again. The hard drive(s) work on my other computer just fine. The first time I got it, it worked for about a day. But when I turned it on again, the error started occurring. I tried the replacement of mb and cpu, but still the same thing. Would you please help me?

try booting from the cd and selecting the repair option....that should sort it HTH Alan56

I tried that, but it would still not boot. The weird thing is that windows loads on my old comp just fine, but with this new mb it doesn't. I beginning to think it's the DDR stick, but what else could it be? BIOS settings?