I'd planned on upgrading my motherboard from a Gigabyte 780G to a 785G model but just found out that if you use the upgrade version on W7, it has to be installed on the hard drive, you can't just put in your XP CD to prove you have a legitimate copy of XP. I was thinking of changing the motherboard and booting from the CD to do a clean install and was wondering if W7 will tell me I have to reactivate XP because of one hardware change. Also, I don't want to keep my old XP install so I wanted to format the hard drive so its totally clean but I'm concerned this will affect the upgrade process. Any suggestions? Thanks