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

'ProgramFiles(x86)' is an environment variable automatically defined by cmd.exe (both 32-bit and 64-bit versions) on Windows 64-bit machines only, so try this:

@ECHO OFF

echo Check operating system ...
if defined PROGRAMFILES(X86) (
    echo 64-bit sytem detected
) else (
    echo 32-bit sytem detected
)
pause

Answer 2

Here's a nice concise version:

set isX64=False && if /I "%PROCESSOR_ARCHITECTURE%"=="AMD64" ( set isX64=True ) else ( if /I "%PROCESSOR_ARCHITEW6432%"=="AMD64" ( set isX64=True ) )

echo %isX64%

Don't use the "Program Files (x86)" directory as evidence of anything: naughty software can easily create this directory on a 32-bit machine. Instead use the PROCESSOR_ARCHITECTURE and PROCESSOR_ARCHITEW6432 environment variables.

Answer 3

I really do not understand some of the answers given here (sorry for that). The top-voted answer for example does not return the Windows architecture, instead it will give you the processor architecture. While running a 32-bits Windows build on a 64-bits CPU you will get the wrong result (it's a query on hardware being used).

The safest option is to query the BuildLabEx value from the registry.

Determine x86 (intel) or x86-64 (amd)

reg query "HKLM\Software\Microsoft\Windows NT\CurrentVersion" /v "BuildLabEx" | >nul find /i ".x86fre."   && set "_ARCH_=x86" || set "_ARCH_=x86-64"

Determine x86 (intel), x86-64 (amd) or arm

set "_ARCH_=unknown"
reg query "HKLM\Software\Microsoft\Windows NT\CurrentVersion" /v "BuildLabEx" | >nul find /i ".x86fre."   && set "_ARCH_=x86" 
reg query "HKLM\Software\Microsoft\Windows NT\CurrentVersion" /v "BuildLabEx" | >nul find /i ".amd64fre." && set "_ARCH_=x86-64" 
reg query "HKLM\Software\Microsoft\Windows NT\CurrentVersion" /v "BuildLabEx" | >nul find /i ".armfre."   && set "_ARCH_=arm" 

An alternative option (mentioned before)

if defined ProgramFiles(x86) ( set "_ARCH_=x86-64" ) else ( set "_ARCH_=x86" )

The problem with the latter is when you mess up your variables, you are not able to use this method. Checking for the folder's existence will cause problems too when there are leftovers from a previous install (or some user purposely created the folder).

Answer 4

I usually do the following:

:Check_Architecture
if /i "%processor_architecture%"=="x86" (
    IF NOT DEFINED PROCESSOR_ARCHITEW6432 (
        REM Run 32 bit command

    ) ELSE (
        REM Run 64 bit command
    )           
) else (
        REM Run 64 bit command
)

Answer 5

None of the answers here were working in my case (64 bit processor but 32 bit OS), so here's the solution which worked for me:

(set | find "ProgramFiles(x86)" > NUL) && (echo "%ProgramFiles(x86)%" | find "x86") > NUL && set bits=64 || set bits=32

Answer 6

Seems to work if you do only these:

echo "%PROCESSOR_ARCHITECTURE%"

I've found these script which will do specific stuff depending of OS Architecture (x64 or x86):

@echo off
echo Detecting OS processor type

if "%PROCESSOR_ARCHITECTURE%"=="AMD64" goto 64BIT
echo 32-bit OS
\\savdaldpm01\ProtectionAgents\RA\3.0.7558.0\i386\DPMAgentInstaller_x86 /q
goto END
:64BIT
echo 64-bit OS
\\savdaldpm01\ProtectionAgents\RA\3.0.7558.0\amd64\DPMAgentInstaller_x64 /q
:END

"C:\Program Files\Microsoft Data Protection Manager\DPM\bin\setdpmserver.exe" -dpmservername sa

Try to find a way without GOTO please...

For people whom work with Unix systems, uname -m will do the trick.