Solution of failed to connect UNC \\{hostname}\c$ to windows 2016

I also noticed this policy will affect the SMB authentication during you access admin share:

Run gpedit.msc
Please change  GPO: Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Microsoft network server: Server SPN target name validation level to Off.  ran gpupdate /force

both with this registry HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\LocalAccountTokenFilterPolicy DWORD Value (32bit) and gave it a value of 1. 

 and rebooted my system. 

from : https://social.technet.microsoft.com/Forums/en-US/46a0b743-091b-484e-a6f4-ed727e77eb97/windows-10-1703-access-denied-to-c?forum=win10itprosecurity