While trying to troubleshoot this problem we've (Redmare, Flynn Arrowstarr and I) found creating a new administrator account doesn't work for this this particular problem.
Running Sims 3 as administrator does not work either.
As what the problem is we were simply trying to gain access to our saved games.
Hubby and I did some searching. We found something that sounded like a similar problem. (Meta.data file missing from game)
So we did more testing - deleted the meta.data file from a current game. Loaded the game to find, No saved game photo. Moused over where the saved game should of been in the main menu and it gave us an error message of:
Cannot load this save game. It may have been saved with expansion pack data that is no longer present on this system.
We've made sure sure we've got all our expansions, stuff packs and store content installed.