Re: Sims 4 is suddenly uninstalled

@WarblingLion0  What antivirus do you use?

Where is your game installed?  If you're not sure, search for TS4_x64 , select it, click "Open file location," right-click the file, select Properties > General, and post the full Location.  You can see most of the file path in the address bar, but this ensures you're not missing any folders.