Re: Sims 4 update won't install
@moonnyxx Try killing the EABackgroundService in the Task Manager.
If that doesn't help, please uninstall the EA App with Revo Uninstaller (the free version is fine), then restart your computer, download a fresh copy of the App's installer, and run it.
If the App still doesn't load normally, please let me know what antivirus you use. Please also post a screenshot of what you see when you open the App.