*posted this on main OT forum before I realized this one was here*.. I'm currently running Windows XP Pro and Office XP Pro software from my schools campus computer store. I've installed both and activated both of them already. However, I want to format my hard drive completely, and start fresh with a new install from that XP Pro CD (and then Office later on). My question is..given the fact that I have already activated the products, will I be able to activate them again after a fresh install? It will be on the exact same computer, which is fully in compliance with the EULA for this software..I'm just worried that the fact that I have already activated it may mean they (Microsoft) have my CD keys or something on file already and wont let them be activated again? Or do they store some sort of hardware authentication as well? So that as long as you're on the same computer, you can install these products over and over? Anyway, thanks in advance.