Did you clean out the registery on your multiple reinstalls ?
Here's instructions for a clean reinstall http://simswiki.info/wiki.php?title=Game_Help:TS3_Uninstall and here: http://answers.ea.com/t5/The-Sims-3/Help-Guide-All-in-one-fix-except-hardware-issues-PC-only/m-p/734448#M36281 where it says Delete game installers
Is that what you did ? Did you patch your game ?
I followed similar instructions to http://simswiki.info/wiki.php?title=Game_Help:TS3_Uninstall, but not http://answers.ea.com/t5/The-Sims-3/Help-Guide-All-in-one-fix-except-hardware-issues-PC-only/m-p/734..., but i just redid it your way and still no luck.
Im not sure how to patch it in my condition, instructions to patch tell me to open the launcher and go to updates tab to patch it, but the launcher crashes when i try to open it...
Try downloading the patch manually here:
http://answers.ea.com/t5/The-Sims-3/FAQ-Patch-1-67/td-p/67858/
