I turned off the firewall on both computers and tried to access through the network, nada,.Tried mapping to network drive again, nada.

OK, so I tried to map to drive "Z:" and I entered my username and password and got the message "Windows cannot access \\Desktop-PC. You do not have permission to access Desktop-PC. Contact your network administrator to request access."
"For more about permissions, see windows help and support."

I tried again to map to “Y:” to try another user/password. It didn't give me a password the 2nd or third time, just the "cannot access" message.

So I went through and it says
You haven't created or joined a homegroup
*I am a member of the homegroup...*
You're not using a homegroup...
*Yes, we are*
Network discovery is turned off
*No, on both computers*
Password protected sharing is turned on
*Yes, for all computers*
The computers aren't in the same workgroup
*Yes, I checked that and they all are*
Group Policy might be blocking the connection
*No, or that is not true for the other computers and I doubt that is the case*
Your computer doesn't have the latest updates for your router
*That may be true, but why is it that everyone else can get on?*