I have three computers networked via a router and Ethernet cabling. All are in the same Workgroup and I have set up drive sharing on them all. All can see the others and their shared drives listed in 'My Network Connections. However whilst I can see files and folders and access them on two of them, on the other which is my main computer the files and folders cannot be seen from the other two computers. When I try to access the contents of the shared drives I get a window displayed which says '\\Newmain\F-Drive is not accessible. You may not have permission to access this resource etc,etc,etc' ' Can anyone suggest what is causing this and a way of curing the problem.