touchpad problems

@thatshydork  Try moving 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 test the touchpad in-game and let me know whether it works normally.  Please test both the Sims 3 and the Sims 4 camera. 

If that doesn't make a difference, try playing in a clean boot:

https://www.windowscentral.com/how-clean-boot-windows-10

If that doesn't help either, please run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

It would also help to try using a mouse, if you have one to test with—it's useful to know whether the mouse functions work as intended, even if you'd prefer to go back to using the touchpad.