If you're not sharing with other computers at home or no other computers are sharing the connection then it's not a network.

Try a port between 49152 - 65535. Either add that port to your firewall or dare i suggest it, temporarily turn the firewall off. You should press apply, go to menu bar, File>Disconnect, wait a minute & then File>Connect. eg: try 64049 & 65530

I haven't done the different ports yet. I'll give it another shot this
afternoon.

I exited the McAfee Security Center. I even went to the firewall
itself and changed the security setting to open, and rebooted. I
still get the firewall in front of the blue earth. I also went to the
task manager to end any processes McAfee still might have been
running. I didn't get very far with that; for five different McAfee
processes, access was denied when I wanted to end them. Short
of totally uninstalling McAfee, which I ~really~ don't want to have
to do, I think we are starting to run out of options.