Worked fine until I installed expansion

The Sims worked fine until I decided to add the get to work expansion. Now whenever I try to open it it says that ts4.exe has been changed or removed and it won't open. 

Helppp???

The game installation is base game -> Get to Work (GTW) -> ultimate fix. Unfortunately if you decide to install GTW after the latest ultimate fix, the game most likely won't work. 

Try using the fix again or reinstall the game in the above order and see if it helps.



Mod edit: moved to the right section.  

- Carlos