you need to turn on file and printer sharing.

Also cannot access the computer by using the //computername command, yet I can see it when I click on show workgroup computers.

Yeah, said it was done already and also it is installed in the properties.  I ran the setup wizard, everything checks out there, disabled all firewalls on the computer, it has a valid IP address for my network, can see and access all other computers, and can copy files to other computers on the network, but just cannot be accessed by anybody, have tried from 4 other computers there.

make sure your network name is the same on all pc's. It should be MSHOME or whatever your other one's are.

No, the network wizard sets up correctly, I've manually opened the necessary ports to connect, yet still I get the error host is not accessible.  Access denied...