We have had this issue for a while on a server 2012 r2 running hyper V.
Whenever we try to reboot the server or just restart the Hyper V service. it fails to stop.
I have been reading some articles online but have not found a definitive fix except to uninstall RRAS service or uncheck a setting in the Vswitch properties.
(Allow Management operating system to share this network adapter) this needs to be unchecked.
Or i read other articles to use a second nic which the server does have 2.
Does anyone know of any other possible fixes or if Microsoft solved this in an update?