Workstation Service Does Not Start


When you start or reboot a computer that has two network adapters installed, the Workstation service may not start and the following error messages may appear in Event Viewer:

Event ID: 3870
Source: Workstation
Description: <computer name> is not a valid computer name.

Event ID: 7023
Source: Service Control Manager
Description: The Workstation service terminated with the following
error: A duplicate name exists on the network.


This behavior can occur if both network adapters attempt to register the same NetBIOS name with the Microsoft Windows Internet Naming Service (WINS).


To resolve this issue, disable the NetBEUI protocol that is bound to one of the network adapters. To do this:

  1. Click Start, point to Settings, click Control Panel, and then double- click Network.
  2. Click the Bindings tab, and then click All Adapters in the Show Bindings For box.
  3. Click the plus sign next to the second network adapter.
  4. Click NetBEUI Protocol, and then click Disable.
  5. Click Close, and then restart the computer.


Microsoft has confirmed this to be a problem in the products listed above.

More Information

For more information about NetBIOS names and WINS, see the following article in the Microsoft Knowledge Base.

103470 NetBIOS Name Conflicts When NetBEUI Used on Multiple NICs

Article ID: 197157 - Last Review: Feb 26, 2007 - Revision: 1