Sometimes the last resort is to reinstall your game. You should really only do this if you have tried everything else for this will take hours.
Before you do reinstall, try this: Resetting the game to factory settings without reinstalling
Unfortunately simply uninstalling the game via the Software Panel often leaves traces and folders behind, making it difficult or even impossible to reinstall.
Follow those instructions for uninstalling at the Sims Wiki carefully and reinstalling go smoothly: Game Help:TS3 Uninstall
Further Reading
How to reinstall the game
Sometimes the last resort is to reinstall your game. You should really only do this if you have tried everything else for this will take hours.
Before you do reinstall, try this: Resetting the game to factory settings without reinstalling
Unfortunately simply uninstalling the game via the Software Panel often leaves traces and folders behind, making it difficult or even impossible to reinstall.
Follow those instructions for uninstalling at the Sims Wiki carefully and reinstalling go smoothly: Game Help:TS3 Uninstall
Further Reading
By crin • Tutorial • Tags: Installation, Uninstall