Remotely Enable Remote Desktop

First you have to enable remote registry:

1. Run "Computer Management" as a different user(Choose the admin for the remote machine)
2. Right Click on "Computer Management (Local)" > Click Connect to another computer
3. Expand services and applications
4. Choose Services
5. Scroll Down, Right Click Remote Registry, Click Start

 

Secondly, To enabling Remote Desktop using regedit, follow these steps:

1. Run REGEDIT as different user(Choose the admin for the remote machine)
2. Click on File, then select Connect Network Registry
3. Type the remote computer Name(or IP) in the Enter the object name to select and the click OK.
4. Now, the remote computer is listed in the Registry Editor.
6. Browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server, in the right panel, seelct  fDenyTSConnection (REG_DWORD). Change the value data from 1 (Remote Desktop disabled) to 0 (Remote Desktop enabled).
7. Close the regeidt.