Uhm.
My sims 3 game works perfectley fine when I'm not in cas mode. But whenever I'm creating my sims the computer shouts down... Like today when I had almost finished my sims... She was so pretty but now she is gone! :'(
Help meeee!

It could be a problem with the game or it could be a problem with your computer. I had the same problem and I cleaned out my computer and it fixed it for the most part. I hope this helps!