I just noticed that I hadn't clarified in my question below, that this is on a Samsung computer, not a phone:  "How do I reinstall the Samsung Settings App?  It's not in the Microsoft Store.  It quit working, I googled it and found advice to uninstall it then reinstall it from the Samsung Update App, but once I uninstalled it, I can't find it in the Samsung Update App.  Apparently the Update App only works for apps already installed.  After finding the whole Model Number, not just the one on the back of the computer, which isn't the complete one, I put that in the Samsung Update App, and found a whole bunch of files, none named Samsung Settings, and no idea how to install them whatever they are.  Some of them say that Samsung Update is already installed when I double click on them.  Still don't know which files to click on to install whatever files I've downloaded.  I tried to use Book Settings instead, but it gives me an error saying I need to install Samsung System Agent first."