If you can't connect to VPN after a cliche Windows Update, Just Uninstall VPN Tool (such as OpenVPN, Sophos etc.) andt install it. It will work, Thank you Windows for providing a traditional bug and a solution for us!
Example Error from VPN Client:
Thu Dec 07 20:59:03 2017 MANAGEMENT: Client disconnected
Thu Dec 07 20:59:03 2017 There are no TAP-Windows adapters on this system. You should be able to create a TAP-Windows adapter by going to Start -> All Programs -> TAP-Windows -> Utilities -> Add a new TAP-Windows virtual ethernet adapter.
Thu Dec 07 20:59:03 2017 Exiting due to fatal error