Quick question about changing my CPU. I intend to go from my dual core e6600 to a quad (Yorkfield) in a couple of months. I know this would require Windows reactivation, but will I have to completely reinstall, or will it be fine just booting up with the quad, and windows takes care of the rest? Is it generally advisable to reinstall with a processor change (ie-what do some of you do?) BTW, I have both XP and VISTA dual booting. Thanks.