how can you identify if an OS is 32 or 64 bit

is there a simple means to find the bit size of an os using a script.
HilarosragsAsked:
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TomasPConnect With a Mentor Commented:
since you stated that the solution should be script based, this is what MS recommends as one of the ways to determine bitness of the installed Windows

 
@echo off
 
Set RegQry=HKLM\Hardware\Description\System\CentralProcessor\0
 
REG.exe Query %RegQry% > checkOS.txt
 
Find /i "x86" < CheckOS.txt > StringCheck.txt
 
If %ERRORLEVEL% == 0 (
    Echo "This is 32 Bit Operating system"
) ELSE (
    Echo "This is 64 Bit Operating System"
)
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bmsjeffCommented:
xp or windows 7?
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JeremySBrownCommented:
If you right click "Computer" and select "Properties" under System type it will tell you if it's a 64-bit or 32-bit OS. 32-bit is also known as x86.
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bmsjeffCommented:
Windows 7
Right click on My computer
Click on Properties
Dialogue box will tell you under "System Type"
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bmsjeffCommented:
XP
Click Start, and then click Run.
Type sysdm.cpl, and then click OK.
Click the General tab. The operating system is displayed as follows:
For a 64-bit version operating system: Windows XP Professional x64 Edition Version < Year> appears under System.
For a 32-bit version operating system: Windows XP Professional Version <Year> appears under System.
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Darius GhassemCommented:
Go to Start Run the type msinfo32 this will bring up the information if you look at System Type this will show you.
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ibrahim52Team LeaderCommented:
If you are looking for scripts and not for command than please visit the link below. Good luck

Referred Link :
http://www.vistax64.com/vb-script/223713-how-find-operating-system-bit-x86-x64-ia64-2.html
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cantorisConnect With a Mentor Commented:
wmic cpu get addresswidth
Returns 32 or 64.  I'm not sure what this returns from a 64-bit capable CPU running a 32-bit OS.

wmic computersystem get systemtype
Is perhaps another to look into?  eg it returns "x64-based PC" on my machine.

Attached is some VBScript based on the first possibility.
strHostname = "."
Set objSWbemServices = GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & strHostname & "\root\cimv2")
strWQL = "SELECT AddressWidth FROM Win32_Processor"
Set colCPUs = objSWbemServices.ExecQuery(strWQL)
For Each objCPU In colCPUs
  intWidth = objCPU.AddressWidth
  If intWidth = 32 Then
    WScript.Echo strHostname & " is 32-bit."
  Else
    WScript.Echo strHostname & " is 64-bit."
  End If
Next

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FireW0lfConnect With a Mentor Commented:
The question was to get this via a script

So, open a CMD prompt, and type this:
echo %processor_architecture%

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32 bit shows "x86"
64 bit shows "AMD64" (on my AMD 64 bit Servers), or "IA64", etc

If you want to save this to a file, then simply echo %processor_architecture% > C:\CPU.txt
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cantorisCommented:
It depends what script language is being referred to of course.

In VBScript, you could make use of FireW0lf's suggestion like this:
 
Set objWshShell = WScript.CreateObject("WScript.Shell")
strCPUType = objWshShell.ExpandEnvironmentStrings("%Processor_Architecture%")
WScript.Echo "CPU type is " & strCPUType

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That environment variable also returns "AMD64" on a non-Itanium Intel Processor that supports 64 bit.
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HilarosragsAuthor Commented:
thanks everyone for your quick, accurate answers
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