I recently picked up an emachine from work with windows media center edition 2005 on it. unfortunately the motherboard died, so my hope was to pull the hard drive, reinstall mce because it had a virus and use it in my pc. now i find that it continually says that my code off the COA is not valid, and i cannot install the os. Any ideas on how to figure this out...i cant find a free way to get ahold of microsoft for assistance.