The btx format has been virtually abandoned by Intel and case builders. Try finding an amd btx board used in some gateway and dell systems; it's virtually impossible. Get yourself a new atx case and transfer the drives over to the new case. Use norton backup to save your old files; I usually just format and start over. The dell oem cd for vista or windows xp will work on any non dell motherboard; just activate windows using the original coa sticker number on the side of your old case. I wouldn't remove it; you might damage it, and have trouble reading those tiny numbers. When you activate windows, before hitting the enter key, write down those numbers on a separate piece of paper so you don't have to use the original coa, which fades with time or may get damaged, making the numbers impossible to read. Believe me, it happens. When I upgraded my compaq pc, I used an ecs g33 board ($19.99 closeout at Fry's electronics) and it works perfectly. All the compaq case connectors fit fine on the ecs board, and all front usb, sound, and card reader devices were recognized by vista and worked on the ecs board. That's much cheaper than buying another hp motherboard on ebay. Hp won't sell you one unless you send in the whole pc for them to do it; and that's more than what I originally paid for the whole pc.