They are all hard wired and run through a linksys router. I can access the internet and if I turn on and offthe other computers "they are running Vista" this Windows 7 computer see's them come and go in the network folder as I turn them on and off. When they are on and appear in the folder if I click on them I get the error above. I have folders shared on this Windows 7 machine and the other computers can see it and access the folders. There is one weird thing I notice in the sharing options I select "turn on network discovery" and save changes but when I go back in the turn of network discovery button is selected all the others stay on what I select for them. I have everything allowed and shared and no passwords.