It's not that administrative shares are disabled, it's that Local Administrators do not have permissions to access administrative shares over the network. It has been this way since Vista onward. You can change it with the registry entry CGA specified:

1.  Click start
2. Type: regedit
3. Press enter
4. In the left, browse to the following folder:<br><br>`HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\system\`

5. Right-click a blank area in the right pane
6. Click New
7. Click DWORD Value
8. Type: LocalAccountTokenFilterPolicy
9. Double-click the item you just created
10. Type 1 into the box
11. Click OK
12. Restart your computer