You change the network adapter on a server without uninstalling the device in windows and end up with a hidden adapter in your registry. I found a solution to remove the lost hardware from windows. Source was http://forums.techarena.in/windows-server-help/1141789.htm
- Open a command window with elevated privileges (Start -> Right-click “Command Prompt”, select “Run as Administrator“)
- In the command window, execute the following commands:
The second command starts the Device Manager. It MUST be started from the elevated-privilege command window for this procedure to work.
- In Device Manager, click the VIEW menu item and select “Show hidden devices”.
- Now remove the greyed out network card