Board powers up fine and boots - no beeps - but then windows shows the message ' there was a problem starting windows" and offers start options. No matter which mode is chosen, it recycles immediately to the same screen all over again. I'm moving a hard drive from another computer into this one, which has XP on it (actually, I tried hard drives with XP from two different machines, with the same exact result). When I've done this in the past, Windows has just recognized the new MB/processor, etc., and then started up. Memory check was positive running a floppy disc diagnostic program. ANy thoughts, anyone? Thanks!