I'm getting a new SATAII hard drive this week. I have Vista Ultimate (Activated) currently running as a Dual boot with XP on a separate Drive. The thing is that the new drive will be faster and I want to put Vista on it. I will be swapping out the drive that Vista is on now and plan on leaving the drive XP is on. My fear is that I may have to reactivate by calling Microsoft for a new key. Of course I could do so but really want to avoid that hassle. Any suggestions?