Strange Windows 10 update

[Windows Central Question]

Earlier this week, my Lenovo desktop received an automatic download. The computer was tied up in installing this for about an hour. When the download was complete, the computer seemed to be scrambled. Basic operations no longer were available. Old programs were missing. I cannot open, e.g., Help, pin apps to the Task Bar, go to Windows Update...it goes on and on. After two days of internet searching, I remain baffled. I know this is vague, but if anyone can suggest something, I'd be greatly appreciative.

 

[shmsnh]

If you know which update it was, try rolling back. Otherwise, you might have to refresh your PC.