I currently have win XP home installed on my hard drive. I've just upgraded my mobo and proc (barebones computer). After adding my drives with the win XP installed, the computer won't boot. I get through post, then I get a stop error (blue screen) with the 0x0000007B error. I can't seem to find anything out on the net that addresses this. Best I could find was a site that said I'd have to reinstall the OS. Also, can't get the computer to boot from the win xp CDROM. Will boot up fine in my old computer from the CD. Could I have the bios settings wrong? The mobo is an ECS K7S5A V.3.1 and AMP XP 1900 cpu. I can't really wipe the drive because it has critical data on it. The win XP is an OEM version, not upgrade version. Also, I've downloaded the install floppies from MS support site but haven't tried them yet. HELP!