The usual reason for this happening is that the key has been abused in some way.
I would suggest that you try contacting the Concierge at MSDN, and see if they can give specifics, or change the key back to the affected one, attempt to Activate it, then post back here with an MGADiag report.
Noel Paton | Nil Carborundum Illegitemi |
CrashFixPC |
The Three-toed Sloth