Enable Drive$ shares on windows

UAC remote restritions: Drive shares are not shared by default even if you login with username and password.

To disable UAC remote restrictions:
Key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System

If the LocalAccountTokenFilterPolicy registry entry does not exist, create it as a DWORD Value.

Set it 1 and all is done.

https://support.microsoft.com/kb/951016