Hello i_rina, thanks for your effort to help me.
I read both articles, and then proceeded to try to follow the directions in "Reinstall macOs".
There are 3 different things to try after a Restart.
I tried each one and none would work. I got to a point where the Reinstall Utility opened up, clicked it, and then got a dialog box that said "Server Cannot Be Reached." My WiFi is on, and working for other apps.
I also found you can't delete and reinstall iTunes and Image Capture separately or alone because they are required by the macOS.
I'm stumped. I have not yet called Apple Support for a phone call with a technician, but I think it may be time.
Thanks, ~ Dave