I removed a Windows XP machine from a non-existent domain to a Workgroup and I can ping the "server" via IP and name, but I cannot access the shared folders.
All other PC's in the workgroup can access them fine.
When I try to browse the WORKGROUP, there is an error message.
I've checked the WINS and NetBIOS settings... all normal. I've done ipconfig /flushdns.
I've checked file sharing and firewall rules.