Re: Unplayable lag and freezing
@rangoon1988 Please repair the game in Origin: open your game library, right-click on the Sims 4 icon, and select Repair. If that doesn't help, disable Game Mode and Game Bar. They each have a category in Windows Settings > Gaming.
If that doesn't help either, please move your entire Sims 4 user data folder out of Documents\Electronic Arts and onto your desktop. When you launch the game, a clean folder will spawn with no content. Don't add anything to this folder yet; just see whether you get the same lag in a new save. Let me know either way.