just a question..... what kind of harddrive are you running Windows on?
I had som problem with my maxtor, the damn things F*cks up when you try to OC your system.
If that's not so then I can only see that it's the copy of WinXp that's causing trouble.
I've come across several WinXp and 2k copies that don't seem to work....
i could be an easy change in BIOS or your cd could be damaged.
Abit IT7 MAX
Pentium 4 2.8 @ 3.25
1024 DDR ram
Western Digital 80,120,200 gb harddrives
Powercolor 9800pro 128mb
with a Zalman 80hp-c
Thermtake Butterfly 480w psu
Zalman 6 channel fan controller
And all of it in a Cheiftec Fulltower