If the System Event log has:
Event ID: 3870 Source: Workstation Description:chances are that both network adapters are attempting to register the same NETBIOS name with WINS.
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.
Use Control Panel / Network / Bindings tab/ Show Bindings For and click All Adapters
Click the plus sign next to the second network adapter.
Click NetBEUI Protocol, and then click Disable.
Shutdown and restart.