@Mercellusive So the game has never run on this computer? Do you have a Sims 4 folder in Documents\Electronic Arts? If so, please attach the config.log file inside. You can delete your user and computer names, about 25 lines down, but the file doesn't contain any other identifying information.
For the issue itself, please try playing in a clean boot:
https://www.windowscentral.com/how-clean-boot-windows-10
When you restart, go through the Task Manager's background processes list and shut down anything that doesn't need to be running. A number of apps, everything from MSI Afterburner to RGB software, don't get disabled during a clean boot, so you'll need to deal with them manually.
@puzzlezaddict Unfortunately, playing from a clean boot doesn't fix the issue.
I followed the guide and made sure to disable all the extra stuff, but it hasn't worked.
@Mercellusive In case it's really that easy (sometimes it is), try clearing Origin's cache and then repairing the game: open your game library, right-click on the Sims 4 icon, and seelct Repair. Here's how to clear Origin's cache:
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
Since you haven't been able to play, it's probably not relevant, but if you have added mods or custom content, please move the entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop. This gets everything out of the way at once. And if you've installed Reshade for Sims 4, please get rid of that too.
You mentioned trying to play in windowed mode, but how did you do that? There's a setting in GeForce Experience, which you can try, and there's also a way within Origin: open your game library, right-click on the Sims 4 icon, select Game Properties > Advanced Launch Options, and enter -w (with the - sign) in the command line box. When you do this, please shut down GFE first, so its settings don't have any effect.
If none of that helps, please try disabling your antivirus, at least long enough to test. It's often not enough anymore to simply set exceptions for Sims 4 and Origin.
@puzzlezaddict I've cleared Origin's cache and disabled my antivirus long enough for The Sims to work, and nothing.
I've been running it in windowed using the method you described, with -w in the game properties tab. I will try completely closing GFE and see how that works.
For now, the LE is still working just fine and I've had a great time playing so far.
