How to enable Remote Desktop on Windows 2008 R2 (Core Edition)
• Logon into the server console
Command to enable remote administration from Windows Vista/Windows 2008
Windows Shell
Cscript %windir%\system32\SCRegEdit.wsf /ar 0
To enable remote administration from Windows XP/2003 and earlier operating system;
Write the command in the Windows shell:
Cscript %windir%\system32\SCRegEdit.wsf /ar 0
Cscript %windir%\system32\SCRegEdit.wsf /cs 0