Hi,
For product key issues, please contact Microsoft Customer Service:
Microsoft Customer Service: (800) 426-9400, available Monday through Friday, from 6:30 A.M. to 5:30 P.M. Pacific Time.
Note: Microsoft Customer Service mainly handles issues regarding replacement manuals, disks, drivers and service packs, product IDs, lost CD keys, product orders, policies related to copying software on additional computers, licensing, and product registration.
Hope it helps.
Tim Quan - MSFT