Gary,
This mmc session was on computer "B" (V3500), Windows 7 pro.

Here is some documentation:
https://www.ultimatewindowssecurity.com/wiki/page.aspx?spid=NANoAnonShares#:~:text=accounts%20and%20shares-,Network%20access%3A%20Do%20not%20allow%20anonymous%20enumeration%20of%20SAM%20accounts,the%20enumeration%20of%20user%20accounts.&text=Anonymous%20enumeration%20of%20user%20accounts,try%20to%20guess%20the%20passwords.

"Network access: Do not allow anonymous enumeration of SAM accounts and shares" is set to "Enabled".

This is my first experience with mmc. I managed to stumble onto the correct snap-in - but when I went to do the same on my OTHER W7 computer that does NOT have this problem ... I could not figure it out :-( ... Which snap-in is it? I seem to recall there was a sub- selection to get Local Computer Policy .
-Randal