@HellzKillerRox Sorry for the late reply; I got pulled away from the computer early yesterday and didn't end up responding to everything like I'd planned.
I have two suggestions here, which you can do in either order. One is to uninstall Sims 3 and the EA App with Revo Uninstaller (the free version is fine), then restart and reinstall both. In this case, I would disabling Norton before reinstalling the App, and not reenabling it until after you've tested Sims 3; and also using another new local admin account to reinstall, just to be thorough. If you want to preserve your saves or other user data, rename the original Sims 3 folder you moved out of Documents > Electronic Arts so that Revo doesn't flag it for deletion.
The other suggestion is to do a repair install of Windows, because this could be a system issue and a repair install addresses a lot of problems at once without too much hassle. Here's how to do it (option two):
https://www.elevenforum.com/t/repair-install-windows-11-with-an-in-place-upgrade.418/
This shouldn't delete your data, but if you get to step 14 and are NOT asked to keep personal files and apps, back out and start over.
You can do these in either order, although the repair install is a lot faster if you don't have extremely fast download speeds.