Sims 4 fullscreen mode keeps minimizing

I stated in my original message that I've already attempted a clean boot without any background processes running but that didn't help either and the game still would not stay open. I've also turned off every overlay and notification I can think of. Geforce, Origin, Windows Notifications, Windows error reporting. I don't believe I have any other overlay programs. Also, the more I've tried to open sims in fullscreen is less functional it is. Now if I can manage to open it before the settings revert, all it takes is moving my mouse over the X button that appears and it shoves itself right back into the taskbar.
I've also gone into the task manager and set the Sims 4 process as high priority but that doesn't seem to have changed anything either. I'm almost to the point where I've considered completely resetting my PC to factory settings (backing up and keeping all files of course) but I wonder if whatever is causing this won't change even after all that.

For windowed fullscreen, I have a noticeably lower fps and the game gets choppy and laggy if I move the camera too fast. While I don't have a high end gaming laptop, I do have a rather good one that's better than my old one, and that one ran sims just fine before its motherboard died from other causes.