After my pc automatically updated two days ago I didn't use it much because I was sick. I turned it on this morning to join class and to my surprise a error message popped up saying "Trouble registering into this account" so I turned it off and attempted to turn it on again. When I finally signed in my whole screen had reset to the default wallpaper. Only four apps are on the home screen. The start icon and the entire toolbar is missing and I can't open apps such as settings.