Remote Desktop (Win 7) Woes on Home Network with Norton Security 2015

Hi! I have two identical PCs on a home network running Windows 7 64 bit. On both machines, Remote Desktop services are enabled, but I can't remote into the other PC. Error says to check to make sure that services are started, that PC is on the network, etc. I can see files on the other PC just fine.

Even though Norton Security 2015 takes over Firewall function, I ensured that Windows Firewall allowed remote connections, but no luck. I then disabled Norton Security firewall on both, no success.

Both PCs also run K9 Web Filter and Malware Bytes.

Any suggestions are much appreciated. Many thanks.