I have windows XP Pro installed on my boot camp partition. I just got Parallels to try it out and get faster access to windows. I installed parallels and selected it to run from my BC partition. Worked fine, a bit slow, but it works. Next I restart to boot into Win XP, and I get this message that says "Your Hardware has changed significantly, activate in 3 days or we will lock your account" Ok, so I press activate, and it works. Now I go back to parallels and the same message comes up. Only this this time it asks for my CDKey and then says the Key is used up (or something) and that I need to buy windows again! Ok, so I choose phone activation, and go through that ANNOYING thing, and it activates. ok, but a few more cycles of going from bootcamp to parallels, and the message pops up again! Am I not allowed to run windows xp, and a virtual machine (OF THE SAME INSTALLATION) on the same computer???? If not, why is it still letting me activate???? Help me, this is so annoying! What number can I call at microsoft to talk to them (gulp...). Just the number for the phone activation??? Please, if you have had this experience help me out, it's so frustrating.