I had the almost same thing happen to me. Except it was from a reinstall. I had to call them, and jump through their hoops. Next time I activate it's going to be a pain, because of all the machines I upgrade (family and stuff), I can't remember what I changed. They do ask you what you chagned, so they can verify it's you the next time you call to re-activate.
I"m a programmer, pre and post internet programmer that's having a hard as nutz time finding a job right now. My skills and EXPERIENCe are tied to windows, but believe me, when teh day comes that I can switch, I will. I don't use Office XP, nor will I ever. I use XP PRO because I have to (testing for development purposes).
I always buy my software that I use, and I have no quams about doing that. But, I'm one of the millions I hope, that will eventually tell Microsoft to stuff it.
<--- Looking and hoping for ways to make a segueway into Linux as my bread earner.