Much easier now
https://support.microsoft.com/en-us/help/4027762/windows-use-your-pc-as-a-mobile-hotspot
netsh wlan set hostednetwork mode=allow ssid=yourssid key=yourkey
netsh wlan start hostednetwork
To fix that go to Device Manager, then open the network adapters tree , right click button on Microsoft Hosted Network Virtual Adapter and click on enable.