Thursday, January 20, 2011

Determine Win7 version on install DVD

I recently faced the question on how to determine the version of an given blank Windows 7 DVD.

After some web search and I had tried several ways here’s how you do this.

On my web search I discovered 3 ways to determine if the given DVD is an install media of an 32- or 64-bit system.

The first way is to take a look at the autorun.inf at the root of the DVD. Here you will find a section named [Autorun] and the whole file looks like this:


This is how it will look for 32-bit systems. 64-bit Autorun.inf contains the following lines:


open=sources\sperr32.exe x64


The second way is to check the file header of the actionqueue.dll within the sources directory.

The file header can be dumped with

dumpbin.exe /headers actionqueue.dll

dumpbin is a tool of the Windows SDK and is also shipped with Visual Studio (usually located at %ProgramFiles%\Microsoft Visual Studio 10.0\VC\bin\). Don’t forget to run vcvars32.bat to set up the environment before executing dumpbin.exe.

This prints out the following details:

Microsoft (R) COFF/PE Dumper Version 10.00.30319.01
Copyright (C) Microsoft Corporation. All rights reserved.

Dump of file actionqueue.dll

PE signature found

File Type: DLL

14C machine (x86)
4 number of sections
4A5BDAEF time date stamp Tue Jul 14 03:10:07 2009
0 file pointer to symbol table
0 number of symbols
E0 size of optional header
2102 characteristics
32 bit word machine

Where file header @ 14C describes the target system. In this case this is x86 for 32-bit. In the case of 64-bit you will find the value x64 at the same position.


If you have already an installed Windows 7 System there is a third way. Just open up a console with admin rights and type

dism /Get-WimInfo /WimFile:D:\sources\boot.wim

which get’s the information from the windows boot image file and brings up the following information:

Deployment Image Servicing and Management tool Version: 6.1.7600.16385

Details for image : D:\sources\boot.wim

Index : 1
Name : Microsoft Windows PE (x86)
Description : Microsoft Windows PE (x86)
Size : 806,390,831 bytes

Index : 2
Name : Microsoft Windows Setup (x86)
Description : Microsoft Windows Setup (x86)
Size : 881,382,947 bytes

The operation completed successfully.


Have fun.

All this could also be found @

1 comment:

  1. Hello!
    I have an app which come in 32bits vers.(x86) and 64bits (x86_64 or Amd64) and I want to put them both on the same DVD in separate folder Ex. x32 for 32bits one and x64 for 64bits one and in the root of dvd an autorun.inf which points to the right folder/app and setup.exe inside as follows:


    it will work if dvd will be inserted into an 64bits Windows will launch 64bits setup.exe and in an 32bits Windows the 32bits setup.exe from their locations ???
    And2nd question in the upper line instead of .Amd64 will work .x86_64 (ass not all 64bits machines are AMD...)