A duplicate name exists on the network
This error is caused by two adapters on the same computer using the NetBEUI protocol. NetBEUI can be used on only one adapter on a given network segment. Each computer using NetBEUI must use a unique NETBIOS name (taken from the computer name in the system properties). Because there is no means of assigning a unique name to each adapter, enabling NetBEUI on more than one causes a naming conflict.
Disable NetBEUI on all but one interface
The solution to this error is to enable NetBEUI on only one network interface. You can simply disable NetBEUI on the additional interfaces.
Tip
You don’t need to disable NetBEUI on dial-up adapters or VPN connections because the protocol is encapsulated and doesn’t cause a naming conflict.
Open the Network and Dial-Up Connections folder, and then open the properties for the interface where you want to disable NetBEUI.
Deselect the NetBEUI protocol in the Components list and click OK.
Repeat the process for any other interfaces on which you need to disable NetBEUI.
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