Sims 4 Steam won't lauch issue
@ThatsSketchii There are supposed to be two separate Sims 4 folders. One contains the game's program files, as in, the data that Origin or Steam installs. For a Steam install, that data should be here:
...Steam\steamapps\common\The Sims 4
wherever Steam itself is installed. The second folder is the user folder, as in, saves, saved households and builds, mods and custom content—anything you as a user create or add to your game. This folder is located in Documents\Electronic Arts, and if the game doesn't find a Sims 4 folder there, it creates a new one. It won't read a user folder anywhere else, so if you add mods to some folder within Program Files (x86), those mods won't be loaded.
For the error in your screenshot, please clear Origin's cache and uninstall it "the hard way":
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
https://help.ea.com/en-us/help/origin/origin/manually-uninstalling-origin/
Download the full Origin installer and run it as an admin: right-click on the download and select "Run as administrator." This is a direct download link:
http://download.dm.origin.com/origin/live/OriginSetup.exe
Run both Steam and Origin as an admin as well, then try to open Sims 4.
