Sorry if this is a repost, but I searched through the forums and I didn't find anything about this. Anyways...I'm leaning towards getting a copy of Windows XP Professional, it's pretty cheap at NewEgg, so I started reading about activation. It sounds like it's not too big a deal, and it sounds like I can continue to use XP when I buy a new computer. My question is, is there a limited number of times I can reactivate? I upgrade fairly often, and I don't want to eventually have to buy a new copy of Windows XP with a new ID number to continue to use it. Does anyone know whether or not you can reactivate a limited number of times?