I have a simple peer-to-peer workgroup setup in an office of 2 desktops and 2 laptops. All connect to the internet via an ADSL modem which is networked via a 5 port hub. There are no wireless connections. All can connect to the internet.

The problem is 3 of the computers are unable to browse the workgroup and can not connect to shared resources (file/print). The error I receive when trying to access the workgroup is "<Workgroup> is not accessible. You may not have permission to access this server. Please contact your Administrator....". I can ping other computers on the network using both IP and PCName with no problem.

One desktop is working AOK.

I have checked and double checked network settings and services to no avail. File and Print sharing is turned on, Computer Browser service is on, 3rd party firewalls disabled.

I'm tearing my hair out... please help!