d0fdef48c2338f24 Your dxdiag shows that a component of McAfee is crashing, and it's possible McAfee is blocking Sims 3 from starting, especially since there are no Sims 3 errors in the dxdiag. (No errors typically means that the program is blocked rather than crashing.)
Because McAfee is crashing, I would suggest uninstalling and reinstalling it. Here's how to remove it:
https://www.mcafee.com/support/s/article/000001616?language=en_US
Since you're uninstalling anyway, it's worth testing Sims 3 before reinstalling. Clear the EA App's cache, again, if you have already, and repair the game (Sims 3 > Manage > Repair), then try to play.
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
I'd suggest testing in the new account if the main one doesn't work. It's kind of overkill to try uninstalling and reinstalling, but if you want to know you did everything, try it, still with McAfee gone and using another new folder in case McAfee changed the permissions on the folder you previously used. As long as you don't do anything else at the same time, your computer will be safe.
If and when you do reinstall McAfee, and I'm not making that decision for you, be sure to set exceptions for EADesktop.exe, TS3.exe, and Sims3Launcher.exe before you try to launch the game again. As far as your antivirus is concerned, you don't necessarily need anything more powerful than Windows Defender, which works very well these days without blocking the programs you might actually want. But it's your call.
That makes sense. I have uninstalled McAfee both with the standard Windows-method described in the link you sent, and via MCPR. I then tried clearing the cache and repaired the game and then launching the game with the same error code as before... I did this in the new local profile I created yesterday. Tried in my main one too but same result of course. I tried uninstalling and re-installing in my local account in a new folder at C:/ - no luck.
I didn't try uninstalling McAffee as an advanced user (third step described in the link you sent) because I tried searching everywhere on the computer and can't find any trace of any McAfee-files left. Tried Revo too. Is it possible some McAfee file is still hiding somewhere and causing problems? I have no intention of re-installing it, it came with the computer and I haven't had any subscription since the free trial expired.
Ran a new dxdiag, does it say anything different?
