Hey Ijack, thanks for asking. I built a nice system for my wife on this chassis 10 years ago (MSI Turbo2 MB, AMD Socket A 1700, all Antec, etc) but the single-core processor cannot keep pace with the new quads - the only reason to rebuild. About 2 years ago, I decided to install a backup HD (WD 80G IDE) with legal XP and Office. It sat idling, though unused for these past 2 years. This is the HD I am trying to start up on in this new system (MSI 870A-55 MB, AMD Phenom II x4, MSI 5670 Graphics Card). The system goes through POST just fine - everything lights up and spins, but the screen after the POST screen says HD not detected, then I go immediately to a screen with the 5 options of "start in fail safe, start windows normally, etc). Once I hit enter, the system rePOSTs. I cannot seem to move past this cycle of events.