Running with new MoBo

I upgraded my MoBo and processor, thinking that if I left the HDDs alone I could boot up, load some new drivers, and be happy with a new, faster machine. WRONG! :banghead: The computer boots, starts to load windows, reboots. It can do this all day. Is there any way that I can save all of my software installations or do I have to reinstall everything?

I still have the old MoBo, and if I reconnect the HDDs to it it boots just fine.