Error 5123: The Computer Name You Specified Is Already in Use
Article ID: 126963
Article Last Modified on 9/25/1999
APPLIES TO
- Microsoft Windows for Workgroups 3.11
This article was previously published under Q126963
SYMPTOMS
When you start Microsoft Windows for Workgroups, you receive the following
error message:
The following error occurred while loading protocol number 0
Error 5123: The computer name you specified is already in use on
the network. Choose the Network Icon in Control Panel to specify a
different name. For more information choose the Help button.
CAUSE
This error can occur if you have multiple network cards in your computer
running on a single network segment and you are using the NetBEUI network
protocol. The NetBEUI protocol tries to register the same computer name on
the network once for each network card in the computer. When NetBEUI tries
to register the second card on the network with the same computer name as
the first card, the error occurs.
RESOLUTION
Use Network Setup to remove the NetBEUI protocol from all but one of the
network cards in your computer.
MORE INFORMATION
Additional query words: 3.11
Keywords: KB126963