Sims 4 won't update

@JennaStaAna2005  Have you restarted your computer yet?  If not, do so now.  You can also try repairing before updating: right-click on the Sims 4 icon in your game library and select Repair.

If that doesn't help, clear Origin's cache again, then uninstall it "the hard way."  Restart your computer when you're done.

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/

https://help.ea.com/en-us/help/origin/origin/manually-uninstalling-origin/

Download the full installer, not the usual ThinSetup, and run it as an admin: right-click on the download and select "Run as administrator."

http://download.dm.origin.com/origin/live/OriginSetup.exe

When Origin is installed, run it as an admin too.  Then try to update your game.  If it doesn't work, clear Origin's cache again, restart your computer, then repair the game, then try the update.