I have been trying for over 6 weeks to get my 2010 Pro Plus working again, and have tried everything suggested on various forums. What is odd with my problem, is that my copy was working fine for 6 months, and then 6 weeks ago stopped! When I tried to open
it, I was shown the installation screen and asked for my Product Key. This was weird enough, but on trying to re-install it got the same message as everyone else here has. I am running Win 7 64bit. Mine is a copy from software4 students and an upgrade from
Office 2007, which by the way, I can re-install no problem. It's not a trial version and was registered on installation. I contacted s4s and they were less than helpful, suggesting I speak to MS - well, we all know how easy that is?!
I would be very interested to know if anyone has the same issue of 2010 being fine for months and then stopping. I do wonder if it has anything to do with any Windows Updates?
It is SO frustrating!