I have a few computers around the house all running either Windows 7 or Vista. There is one particular machine, though, that cannot access any other machine on the network; including itself. I get the error: "<Machine> is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions. The specified network provider name is invalid." Here's the weird thing though, *other* computers on the network can access this machine perfectly fine. I can access shared files, login using a username/password and have write permission, etc. It's only on this particular machine (Win 7 Ultimate) that I cannot access any other networked computers. I even tried just accessing itself through the network name and it gave me the same error. This is a relatively fresh install with no firewalls running on any of the machines. There's Kaspersky anti-virus, but I've disabled it for the purposes of testing. I receive the same error.

Verify in all Network Adapter properties that the "Client for Microsoft Networks " is installed. Jerry