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

Using Windows Powershell, if the following expression returns true, then it's a 64 bit OS:

(([Array](Get-WmiObject -Class Win32_Processor | Select-Object AddressWidth))[0].AddressWidth -eq 64)

This was taken and modified from: http://depsharee.blogspot.com/2011/06/how-do-detect-operating-system.html (Method #3). I've tested this on Win7 64 bit (in both 32 and 64 bit PowerShell sessions), and XP 32 bit.