EA Launcher won't launch Sims 4

CurtisHonts  Please try playing in a clean user folder.  Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop.  When you launch the game, if it launches, a clean folder will spawn with no content.  (Your saves and other content will be intact in the folder you've moved but temporarily unread by the game.)  Don't add anything to the new folder yet; just start a new save and see how it runs.

If you still can't play, please provide a dxdiag.  Hit Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop.  From there, you can attach it to a reply using the camera (Insert Media) icon included with the other formatting buttons.

I had already done the Move the entire Sims 4 folder out of Documents > Electronic Arts and onto your desktop, as I have seen it a few places online and on this board, it did nothing to improve my problem, and there is no starting a new save because the game does not launch from the EA launcher

I should add, when I did that it simply brought up the EA Launcher and a prompt that said that Sims was not installed, as it was looking for a folder that no longer existed, or was filled

After which I installed, and the same issue persisted 

CurtisHonts  Your dxdiag lists a few generic Windows errors, so please run a couple of basic checks of your Windows system files:

• Hit Windows key-X
• Choose either “PowerShell (Administrator)” or “Windows Terminal (Administrator),” whichever option is offered
• Inside the window that appears, copy and paste “DISM.exe /Online /Cleanup-image /Restorehealth” without quotes, and enter
• The system will start validating soon. If it throws an error, please list it here
• After it reaches 100%, hit Windows key-X again
• Again, choose “PowerShell (Administrator)” or “Windows Terminal (Administrator)”
• Inside the window, copy and paste “sfc /scannow” without quotes, and enter
• Post the message you receive here

Restart your computer, hit Windows key-i, select Update & Security, and click the box to check for updates.  If any install, restart again afterwards.

For the game itself, please clean-uninstall and reinstall it as described here:

https://answers.ea.com/t5/PC/CURRENT-ISSUE-Sims-4-DLC-shows-as-installed-won-t-load-in-game/m-p/12942151#uninstall

In particular, make sure you're creating a new folder on the root level of the drive of your choice when reinstalling the game.

PS C:\WINDOWS\system32> DISM.exe /Online /Cleanup-image /Restorehealth

Deployment Image Servicing and Management tool
Version: 10.0.19041.3636

Image Version: 10.0.19045.4894

Doesn't seem to 100% anything

As for sfc /scannow
 PS C:\WINDOWS\system32> sfc /scannow

Used the program suggested to remove Sims 4+EA APP and reinstalled, the problem did not change, I hit play on the App and the window disappears briefly, before simply popping back up

I had roughly same problem, sims wasnt loading, it was coming up with permissions error, i read that i should, right click on EA logo on desktop and click on "run as administrator\2 do the same with the Sims logo then restart your computer.  I did this and after all the faffing about uninstalling and reinstalling, clearing caches and the likes it worked,.  Now im not sure it will work for your problem, but worth a try.

CurtisHonts  DISM and sfc should both run to completion, which takes a few minutes but typically not much more than that.  DISM would say "the restore operation completed successfully" if it worked; sfc would have one of a few responses.  If they're not running at all, please restart your computer and try again, with nothing else running in the background and with no pending Windows updates (you can check under Windows Settings > Update & Security).  If they still don't work, that's a separate issue.

CurtisHonts  Yes, and that secound account should be "local": NOT be linked to your Microsoft account.  You'll need to choose something like "I don't have this person's info" and then answer some security questions.

CurtisHonts  A local account specifically doesn't require an email (you should be able to choose "I don't have this person's info," as mentioned), so it sounds like you didn't make one.  But that's okay since the game worked.  What that means is that your main account is the issue.

In the main account, please pause OneDrive syncing, if OneDrive is active at all.  Look for the cloud icon in the lower-right corner of the screen; if you don't see it, click the ^ (Tray) icon and look there.  You'll see options to pause syncing for various lengths of time.

If that doesn't help, please try the suggestions in the first post of this thread:

https://answers.ea.com/t5/PC/CURRENT-ISSUE-Sims-4-already-running/td-p/13276380

specifically the ones listed after creating a new Windows account.