My sims screen

Hello,
I just downloaded my sims 2 game and all the expansion packsI have for it. As soon as I finished downloading them I tried to play and it came on but the screen was cut in four. The top half was on the bottom, the bottm half was on the top, the left was on the right, and the right was on the left. As I was downloading each of the expansion packs a box poped up that said something like this will save your game differently and if you want to uninstall something ( i cant remember) will happen. I think that might have something to do with it but I need help fixing my screen. It didnt mess up the computer screen in any way just the screen for the actual game. Can someone please help me, I would really appreciate it. Thanks