Sims3 glitching in create-a-sim mode

Hello,

okay so I've played sims since it came out, but for the last two months I've been so agrivated that I can't bring myself to play it. When I'm creating a sim the scroll bars for body size and muscle size are working, but they aren't working properly. All it does is move the legs and head out of sync with the rest of the body. I've asked a bunch of people and done everything they told me. I've defragmented my computer, and taken off everything it doesn't absolutley need to run the internet and my sims game.