@ECHO OFF
NBTSTAT -a * | FIND /I "MAC Address" > TEMP.BAT
IF ERRORLEVEL 1 GOTO End
> MAC.BAT ECHO SET MacAddress=%%2
CALL TEMP.BAT
ECHO MacAddress=%MacAddress%
:End
IF EXIST TEMP.BAT DEL TEMP.BAT
IF EXIST MAC.BAT  DEL MAC.BAT