TS4 won't launch, even after trying everything.

@gummytulips  Please let me know what antivirus you use, and whether it helps to disable it (temporarily) and repair the game in Steam.  The option is something like "Verify integrity of the game files" and used to be under Properties > Local files.  As long as you don't do anything else while your antivirus is disabled, only test Sims 4, your computer should be safe.

If that doesn't help, please run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

And if you see an error message when trying to play, please post a screenshot of it.

I don't use an antivirus, unless you count the one built into Windows 11. But I don't know how to disable that. I've repaired before with no luck. No error message. This is my dxdiag (I hope I did it right).

I did as you said and the game began to reinstall. My computer is pretty slow so this might take a few hours. I'll see if this works. Thank you for your help so far.

God's holy light shined down upon me and I saw the face of the omnipotent puzzlezaddict. The game launched. Thank you so much. Someone needs to pay you for this *.