I have a Surface Pro (original version) that was running 8.1. I recently upgraded to Windows 10 through the Microsoft upgrade site. The upgrade worked normally as I have upgraded 4 other machines before this one. Each machine has gone flawlessly. With this one, after rebooting for the final time, I have lost network connectivity. In fact, I don't show any network adapters in the control panel/Network and Sharing at all.
If I go to the device manager, I have a Marvell Avastar Wireless Composite Device and my docking station Surface Ethernet Adapter. There are no exclamation points in the device manager so I am not sure where to turn next.