I recently won a raffle at work for some old workstation computers and got myself a beautful(ly ugly) HP XW4600t workstation computer. My plan was to get something with a microATX board to make an HTPC from, but alas I ended up with a full ATX board. Its free, so I'm not complaining.
In order to do what I want, I need to retain a copy of windows on this machine. The hard drive has a copy of windows Vista Business on it, and as crappy as an OS as it is, I only need it as a back end to run PlayLater with XBMC.
I also need to scale down the size of the motherboard to get a case that will fit in my TV stand. Hence the post. Is there a way I can change out the motherboard and reuse my existing windows install? I've seen a bunch for Windows 7 and 8, but I worry about Vista, as it always seemed to cause me problems.