Win2k freezes on bootup, even from CD during "repair". Changed m/b, cpu, ram, video card, power supply, kb, mouse; all drives verify ok; using Adaptec SCSI RAID (AAA-131U2) - took everything else out of system. Freezes at "loading windows" as soon as it goes into graphic mode. How can I diagnose, or force repair? I'm pretty sure it's not hardware at this point..