Game will not start

This?

Only while I  have it open waiting for you to reply.  It doesn't like my color shader to change it to a different color for dark mode, while I am trying to read something, since I have chronic migraines. Otherwise, if I am not reading something, it is turned off

(CM: Multiple posts merged. Check out this post for tips on how to edit and add more to a post.)

Have you tried a clean boot yet ?

https://help.ea.com/en/help/faq/how-to-clean-boot-your-pc/

If it works in that mode, then it's a background program interfering and you will need to find out which one.

Just tried that.  The game still is doing the same thing.  Push start.....30 seconds......then goes back to EA app without the game starting.  Nothing was interferring.

This computer is only 5 months old as well.  It is new by all standards.

@DarkAngelBeckon  Please try playing in a new user account on your PC.  Make it an admin account, and a local one, as in, don't sign into Microsoft; don't sign into any other services you normally use either.  The account name should only contain letters and/or numbers, no special characters or accents.  You won't need to reinstall Origin or Sims 4, but you also won't have access to any content from your other account.

If playing in the new account doesn't work, restart your computer and try again, except this time, try playing while your computer is completely offline, as in, disable wifi or disconnect the ethernet cable.  I know you've tried being offline before, but I'm interested to know whether it works in the new account.

Nope, didn't work

@DarkAngelBeckon  Since it's been two weeks and there was a new patch released a couple of days ago, I'd like to see a new dxdiag on this computer.  Please also check your antivirus again: some programs react badly to game updates.  So it's possible it's interfering now, even if it was not before.

I have done the update.  I have put my mods back in the game but took my CC (clothes, hairs, shoes, makeup, etc) out......and the game finally started.  I think it  is one piece of CC that is causing the problems.  I am currently going through each and every piece of CC to figure out which one is causing the issue.  The previous patch broke some sort of CC, or the one when all this started.....so I am working with some of the CC creators to help identify which single piece is causing the issue.  If you have any reports on any sort of CC that was broken from the updates, such as the windows and doors were when Batuu went live, that would help greatly.  Thanks.

@DarkAngelBeckon  Luthienrising on the official Sims forums keeps a list of mods and custom content broken by each patch:

https://forums.thesims.com/en_US/discussion/995765/broken-updated-mods-cc-nov-30-2021-neighborhood-stories-patch

There's a decent chance your cc item is on it.  If not, and you do find the answer another way, it would be helpful if you could post in that thread for the benefit of others.