Problem: How can I allow non Administrator account to c$ share
Cause: Windows does not let any other account but Administrator to access these shares by default.
Prerequisite(s):
Solution(s): HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system\LocalAccountTokenFilterPolicy
0 - build filtered token (Remote UAC enabled)
1 - build elevated token (Remote UAC disabled)
By setting the DWORD entry to 1, you will be able to access the administrative shares since the remote logon token will not be filtered.
Does not matter that you are in the administrators group.