set TempFile=%SystemRoot%\System32\%Random%.temp
( echo benhon.org >%TempFile% ) 1>nul 2>nul
if exist %TempFile% ( del %TempFile% 1>nul 2>nul ) else ( goto UAC_ )

...
main body
...


:UAC_
cls
echo Please run as administrator !!!
echo.
pause
goto EXIT_