windows - batch file to check 64bit or 32bit OS

Question

Can I check to see if current machine is running 64bit OS or 32bit OS inside a batch file?

EDIT:

Found this online and it is good enough to me now:

Answer 1

This is the correct way to perform the check as-per Microsoft's knowledgebase reference ( http://support.microsoft.com/kb/556009 ) that I have re-edited into just a single line of code.

It doesn't rely on any environment variables or folder names and instead checks directly in the registry.

As shown in a full batch file below it sets an environment variable OS equal to either 32BIT or 64BIT that you can use as desired.

@echo OFF

reg Query "HKLMHardwareDescriptionSystemCentralProcessor" | find /i "x86" > NUL && set OS=32BIT || set OS=64BIT

if %OS%==32BIT echo This is a 32bit operating system
if %OS%==64BIT echo This is a 64bit operating system