Corrupt Game files?

[PumpkinQueen]

Hello, I'm new here, and I am having a problem with my game. twice now, when I have made a zoo the following day, or in this case the same day when I go to re-load the game an error comes up saying the file got corrupt.The odd thing is though, it does not happen to my husbands games! We have WinXP so we have our own accounts. Is there something I am doing to make these files go bad? :sign_ques

P.S. I know it can not be that I downloaded something, it is a new game, and I haven't downloaded anything.. I don't even know how to yet.

Thanks in advance =)