Detect whether current Windows version is 32 bit or 64 bit

Question

Believe it or not, my installer is so old that it doesn\'t have an option to detect the 64-bit version of Windows.

Is there a Windows DLL call or (even better) an en

Answer 1

I use this:

@echo off
if "%PROCESSOR_ARCHITECTURE%"=="AMD64" (
 echo 64 BIT
) else (
 echo 32 BIT
)

It works on Windows XP, tested it on Windows XP Professional Both 64 bit and 32 bit.