Issues Launching Sims 4

Hi!

I have the sims 4 downloaded, as well as other expansion packs. I decided that I wanted to add on Parenthood, Toddlers Stuff & Cats and Dogs. I went to install one and then messed up the entire Sims 4.. now when it launches it says 

"A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."

How can I fix everything and install the new expansion packs??

Remove all previous installations with a program like Revo Uninstaller (free).
The install everything again in the correct order.

1. Base Game
2. When base game is installed MOVE, not COPY the folder The Sims 4 from C:\Program Files (x86)\Electronic Arts to f.e. just Program Files (x86)
3. Install Get to Work -> Get Together -> City Living -> Toddlers/Vampires ->Parenthood without playing in between
4. Delete the folder Game from your install folder
5. Install Fitness -> Toddler acc. -> Cats & Dogs

Hi but don't u have to remove and replace most of the game folder when installing some of the expansion packs not only the one after u installed toddlers/vampire

tinacj26 wrote:Hi but don't u have to remove and replace most of the game folder when installing some of the expansion packs not only the one after u installed toddlers/vampire

As stated at #4 you'll have to remove the existing Game folder after the installation of Parenthood and then install Fitness > Toddlers Stuff > Cats & Dogs > Laundry Day.

Reason why I suggest to follow that specific order is:
Toddlers/Vampires requires another Game folder but Parenthood only contains a part of that folder.
Fitness contains a full and complete new Game folder.
Installing that way saves you the hassle of downloading a fix for Toddlers/Vampires.