“You may not be able to join a Microsoft Windows XP Professional-based computer to a Microsoft Windows NT 4.0-based domain. When you try to change the domain membership for the Windows XP Professional-based computer in the Identification Changes dialog box, you receive the following error message:
Network Identification:

The following error occurred validating the name “domain name”.

The specified domain either does not exist or could not be contacted.
If you try to use the net view command from the Windows XP Professional-based computer, you receive the following error message:
System error 53 has occurred.

The network path was not found.
If you try to ping by name from the Windows XP Professional-based computer, it does not work. You can ping by IP address.

CAUSE
This problem may occur if both of the following conditions are true:

* NetBIOS over TCP/IP (NetBT) is disabled on the client computer.
* The TCP/IP protocol is the only protocol that is installed on the client computer.

RESOLUTION
To resolve this problem, enable NetBIOS over TCP/IP (NetBT) on the workstation. To do this, follow these steps.”