I have received the email offer from Microsoft to pre-order 7 for half off. Unfortunately I read that if you have XP you have to install the upgrade on the same partition as XP. That's not a clean install to me. Does anyone know if that means I'm going to have a dual boot setup or what? With only 2 weeks left to pre-order I'd like to get this figured out. Also whats the deal with how many times you can upgrade your hardware? I read that it's a one time thing. Anyone?