OK, I bought Vista home premium 64-bit OEM version to put on my new build. I had to change the motherboard since the original was defective and now Vista is telling me I have to reactivate. I called Microsoft like everyone on here has been able to do and they tell me that since this is an OEM and not retail version changing my motherboard violates the end-user license agreement. They want to charge me 60 bucks to "diagnose" the problem over the phone and maybe reset my product key. Shouldn't they just be able to reset it? I explained to them what happened with the mobo and that I had no way of knowing the mobo would crash and they wouldn't budge. Can anybody offer a suggestion?