I've got a DVD that I've burnt from an MSDN ISO. I'm not entirely sure if its Windows 7 64bit or 32bit.
How can I be sure?
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Quickest way is to go to the drive root. If you have a file named
Bootmgr.efi you are running a X64/64-bit version.
Next way is disk size, the x86/32-bit version comes out at ~2.32GB whilst the x64/64-bit version comes out at ~3.0GB.
Lastly, you can go to the drive root and open the
In notepad, the 64 bit version shows:
[AutoRun.Amd64] open=setup.exe icon=setup.exe,0 [AutoRun] open=sources\sperr32.exe x64 icon=sources\sperr32.exe,0
The 32 bit version shows:
[Autorun] open=setup.exe icon=setup.exe,0
Best and quickest way to answer the question about both Processor architecture and Windows version is:
Use DISM on
dism /get-wiminfo /wimfile:"f:\sources\install.wim"
f:with drive path to installer root).
Deployment Image Servicing and Management tool
Details for image : f:\sources\install.wim
Index : 1 Name : Windows 7 Ultimate Activated 32Bit
Description : Windows 7 ULTIMATE Size : 8,476,902,704 bytes
Index : 2 Name : Windows 7 Ultimate Activated 64Bit
Description : Windows 7 ULTIMATE Size : 12,075,969,989 bytes
The operation completed successfully.
Windows version is on the second line. First two dot pairs are OS version. Third and fourth dot pairs are Service Pack and Build info. See Windows Version Numbers to lookup your version.
Processor architecture is explicitly shown in the remainder of the WIM info. In this case, this is a dual installer for both 32 bit and 64 bit processors, for Windows 7 Ultimate.
To know wich edition see the ei.cfg file located in the Sources directory on the installation DVD
The way would be to see if the disk contains x64 images. Just looking at an MSDN Windows 7 Ultimate x64 DVD and I see the file
<DVD>:\sources\actionqueue.dll is x64.
To check that it is x64 I used
dumpbin /headers <file> (
dumpbin is a Windows SDK tool):
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 FILE HEADER VALUES 8664 machine (x64) 5 number of sections 4A5BE044 time date stamp Tue Jul 14 02:32:52 2009 0 file pointer to symbol table 0 number of symbols F0 size of optional header 2022 characteristics Executable Application can handle large (>2GB) addresses DLL [...]
Note highlighted line (a x86 executable would have
14C machine (x86)).
I can't see any file that lists the bit-ness directly, so this is the quickest way (if you have the SDK tools). Might just be easier to burn a new DVD from the required ISO.
If you have administrator access to a system already running Windows 7 (this feature is not in Vista):
dism /Get-WimInfo /WimFile:X:\sources\boot.wimwhere X is your DVD drive's letter.
You should see something like the following:
Deployment Image Servicing and Management tool Version: 6.1.7600.16385
Details for image : h:\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.
If your disk is 32-bit, it will look like above where it says
(x86). If it's 64-bit, it should say,
If you don't have a computer with Windows 7 already installed, then try installing the operating system in a virtual machine such as VirtualBox. This should work on any computer, even a Mac. If it fails, then you have the 64-bit version and your computer doesn't support/have enabled Hardware-accelerated virtualization. If it installs successfully, then check the System Properties inside the virtual machine.
If you don't want to do that, then download and burn the Windows 7 Automated Installation Kit, and install it (it will work on Vista SP1 or newer). Be warned, the download is 1.7GB, so it's not exactly the ideal way to check this if you have a slow or metered internet connection. Once you have the WAIK installed:
imagex /info X:\sources\boot.wimwhere X is your DVD drive letter. If the output contains the line
<NAME>Microsoft Windows PE (x86)</NAME>, then it's 32-bit. If it says (x64) then it's 64-bit.
imagex /info X:\sources\install.wim, and check for a line starting with
<ARCH>. If that line lists
<ARCH>0</ARCH>then it is 32-bit, otherwise it is 64-bit.
If you get a listing of the root directory on your installation disk, you can see difference in filesizes:
autorun.inffilesize of 122 bytes and 32 bit
autorun.infis 43 bytes.
setup.exefilesize of 106,760 and 32 bit
At least, that's what I have for the downloaded/original ISOs from the Microsoft Store.
This solution also works well if you have an iso file saved in the hard drive. Below are the instructions:
First you need to mount the ISO file to a computer so you can browse it.If you have a DVD as a installation medium,then just simply click on the DVD drive.Then open up a command prompt as administrator and run the following command (note that 'E' is the drive letter for the mounted ISO file here).
dism /Get-WimInfo /WimFile:E:\sources\install.wim /index:1
This will display full details of the built number, architecture, version as well as many other important details for your convenience. The following is an example output from Windows Server 2016.
Index : 1 Name : Windows Server 2016 Standard Description : This option (recommended) reduces management and servicing by installing only what is needed to run most server roles and applications. It does not include a GUI, but you can fully manage the server locally or remotely with Windows PowerShell or other tools. For more details see "Windows Server Installation Options." Size : 9,353,610,808 bytes WIM Bootable : No Architecture : x64 Hal : acpiapic Version : 10.0.14393 ServicePack Build : 0 ServicePack Level : 0 Edition : ServerStandard Installation : Server Core ProductType : ServerNT ProductSuite : Terminal Server System Root : WINDOWS Directories : 14199 Files : 67418 Created : 11/20/2016 - 10:57:52 PM Modified : 11/20/2016 - 10:58:21 PM Languages : en-US (Default) The operation completed successfully.
Best way for checking is Go to drive.../efi/boot/
If bootai32.efi or bootai86.efi or bootx32.efi or bootx32.efi is present, OS is 32bit.
If bootax64.efi or bootai64.efi is present, OS is 64 bit.
Hope this helps.