When I attempt to create a virtual switch, the option to create an external switch is unavailable.

This may or may not be related to something I discovered about my NIC, after reading an online posting, from some site or other, regarding similar Hyper-V difficulty. The box next to the Hyper-V Extensible Virtual Switch property was not checked. I checked the box, immediately prior to making a screen capture with One-note clipper.

just checking the box did nothing, when I still couldn't create an external switch, and went back to look at my NIC's properties, that box was unchecked again. I attempted to install the Protocol for the Hyper-V Extensible Switch, and that's when things went sideways. Most or all of the other property boxes became unchecked, and I lost internet access. I don't know why that happened.
I used system restore to restore my NIC settings to how they were, and decided I should get some help, since I am obviously a little out of my depth here.
Anyone clue me in as to how to get Hyper-V functioning so I can run a virtual OS with internet access?
Edited by Al1000, 05 February 2017 - 01:09 PM.
Moved from Windows 8