Thanks for the replies.

I tried the Blank password. I also tried 'password' as the password. Neither worked.

One other fact, when I asked the owner to open the command prompt and run as administrator, again the query for password with an admin user name came up.
I am wondering if the User Account Control is the root cause. I also found the Account Protection under the Update and Security tab had only the Microsoft account and no Local account.

I also had the user look at the version of MS WIN 10 and he is at Version 1909 and up to date.

Very strange.
Regards,
Dan Kahn