I'd suggest trying a factory reset as well.
Here's the link for that and/or instructions on how to do a factory reset.
Factory Reset: Fix Your Game with 1/4 the Time of a Reinstall
http://www.carls-sims-3-guide.com/forum/index.php/topic,7507.0.htmlFactory Reset =
01.) Go to your Sims 3 folder.
-- Documents > Electronic Arts > The Sims 3
02.) Rename your current Sims 3 folder to something like Sims 3 Current.
03.) Click the Sims 3 icon to create a new The Sims 3 folder.
04.) Then copy your game saves, files and such over to the new game to see if that helps.
Also, something else that may help is to run a registry cleaner, something like Ccleaner. It helps clean up temporary files, internet cache files and other files that are left behind that are no longer being used.
I hope this helps,
MrsFlynn