IF EXIST %windir%\system32\KIX32.EXE (
  IF EXIST %windir%\system32\WKIX32.EXE (
    IF EXIST %windir%\system32\KX32.dll (
      %windir%\system32\kix32.exe %logonserver%\netlogon\logon.kix
      )
    )
  )
ELSE
%logonserver%\netlogon\kix32.exe %logonserver%\netlogon\logon.kix