I was playing the Sims Deluxe Edition fine, and then I installed the Vacation Island expansion pack. I went to play the Sims again, and it told me I had to update my installation. I did so, and was able to play fine. The next day, I tried to play again, and the same screen came up telling me to update the installation. I tried to do so, but the only thing that came up was a box asking if I wanted to uninstall The Sims. I've tried multiple times and that's all that ever happens. How do I fix this?