For Windows 2008 , Server Core & Vista clients type:

Cscript %windir%\system32\SCRegEdit.wsf /ar 0

For Windows XP & Windows 2003 clients type:

cscript %windir%\system32\SCRegEdit.wsf /ar 0

cscript %windir%\system32\SCRegEdit.wsf /cs 0

KB555964 at Microsoft