Can't you just put a shortcut to the adapter on your desktop and right click it and choose disable?
Try this
Windows Logo Key + R
In the run dialog box type
ncpa.cpl
Right click the adapter and choose "Create Shortcut"
You may be informed that you can't create a short cut here do you want it place on your desktop (seems handy since that's exactly what we want to do).
If not then just drag the shortcut to your desktop.
Right click the short cut and choose disable.
Does that work for you?