Quote Originally Posted by bradlesliect View Post
Using XP Pro SP2 and all updates installed.
No, you don't. SP3 has been out for quite a while.

- This workstation can only see the router and no other workstations.
UPnP is turned on..

What the heck is going on? I sat for this for two hours last night. I found things on google that tells me to look for ICS configs on one of the workstations, disable uPnP on devices, change netbui and NETBIOS settings and disable/enable files and printer sharing.
Remove NetBEUI, you really don't need it. The only protocol should be TCP/IP.
Make sure the Computer Browser service is turned on.