How to fix a disabled network interface
By it's nature, off-the-shelf Home Servers are accessible only by Remote Desktop since these servers are headless units with no video connector. This creates a total and complete dependency on network connectivity in order to be able to interact with your server.
In the attempt to set a static IP or troubleshoot a networking issue, some users have disabled the Network Interface without considering that this will leave their server completely inaccessible.
The resolutions to this issue are to either perform a Server Recovery, or build or purchase a video cable that will connect to the server debug connector, or to use a USB keyboard and attempt to blindly interact with the server.
The Best Solution
There have been several different possible mechanisms for attempting to blindly enable a disabled network interface via USB keyboard, and the following instructions by forum member "Qnigma" are recognized as the easiest and most successful.
- Have a keyboard plugged before the Server is turned on
- Turn on the Server
- Wait until you hear almost no disk activity. This could take 10 or more minutes
- Press [ESC] 2 or 3 times
- Press [Ctrl+Alt+Del]
- Hold down [Shift] then press [TAB] briefly 1 time
- Type: administrator
- Press [Tab] (again, 1 brief press)
- Type: your server password
- Press [Enter] and wait 5 minutes
- Press [StartMenuKey] + [r]
- Type: ncpa.cpl
- Press [Enter]
- Wait 60 seconds
- Press [UpArrowKey]
- Press [Enter]
Here is an image of the resulting Network Control. By pressing "Up" in step 15, you are selecting the primary network location. If you have more than one network adapter in your Home Server then this method may not work.