Identifier contains 64 Family, this seems to be an indication that the System is running a 64 bit CPU. @echo off reg query HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 /v "Identifier" | find "64 Family" if %errorlevel% == 1 goto x86 echo 64 bit processor exit /b :x86 echo 32 bit processor