I got a W7 PC, working in a Work Group with several others. The problem is that the W7 PC can visualize every single PC with their shared printer and folders, but is not visible to the others ones. I make ping to the W7PC and i got response, but that one is not accesible. I disabled the windows firewall, the AV firewall, i set the the sharing options to share folders and printers, turned on the pc discovery, without password, and nothing. I dont know what else to do.