So, I've made no hardware changes in the past month or two, and today my system says my system has "changed" and needs to be reactivated or it will stop working. So I "re-activate" online, and it says, "the product key you typed is already in use." So now I guess I have to call M$ and piss my day away talking to robots and or foreigners who can't speak English. How can vista deactivate with no changes? I have made 0 changes that involve hardware. I though the vista activation algorithm was supposedly more forgiving, made more with the enthusiast in mind. The only thing like this that's happened to me before was once in xp when I updated my nvidia drivers it made me reactivate, which was weird, but this situation has no cause that I can figure out. Any thoughts? This makes me pretty upset with M$. Edit: Hmm..., maybe the perfect opportunity to reformat and install vista again, since I'll have to call M$ anyway.