To prevent duplicate threads on the topic I'm locking this one and deferring all replies to this thread.

To answer your additional questions, though, you can report the product key as stolen, though what would be done, if anything, is debatable depending on if you had registered the copy of Windows. (They'll likely want to verify you are the owner before disabling the key...such could be abused.) Also, if that was a manufacturer's installation there may be no point, since now manufacturers are using a volume key and removing the activation process by simply verifying the hardware's authenticity. Thus, the matter may be a moot point. In short, I wouldn't hold out too much hope of support from Microsoft on this matter.

John