Show nonpresent devices in Windows device manager

Reveal the hidden network adapters in Windows. I'm using this in Windows Server 2008 R2.

Run these commands from the command prompt with administrator privileges:

set devmgr_show_nonpresent_devices=1

start devmgmt.msc

Now click View from the File menu and then check 'Show hidden devices'. 

This will only work for this session of the device manager, because we started it from the command prompt with the devmgr_show_nonpresent_devices environment variable set. If you wanted this to be a permanent change, you could add it to the environment variables in system properties.