I will finish a mission and it will say completed but once I restart the game or restart the computer and come back check the mission it is no longer completed. Anyone have any ideas?

I will finish a mission and it will say completed but once I restart the game or restart the computer and come back check the mission it is no longer completed. Anyone have any ideas?

It would help to know which Opertaing System you are running - XP, Vista or Win 7.If either of the latter you may have a "permissions" issue which needs to be resolved first.

I am running Windows 7 64 bit edition. I have never had this problem before. Do I need to go into my account settings on the computer and change something?