"Reason 442: failed to enable Virtual Adapter"
I found one fix for Windows 7 (where you have to disable the “Internet Connection Sharing” on the services list) but it didn’t work for Windows Server 2012. To fix the issue on the server platform you have to find following registry key and change the field “DisplayName” for:
@oem8.inf,%CVirtA_Desc%;Cisco Systems VPN Adapter for 64-bit Windows
Cisco Systems VPN Adapter for 64-bit Windows