This solution also works well if you have an iso file saved in the hard drive. If that line lists 0 then it is 32-bit, otherwise it is 64-bit.
Alternatively, type imagex /info X:\sources\install.wim, and check for a line starting with. If the output contains the line Microsoft Windows PE (x86), then it's 32-bit. Type: imagex /info X:\sources\boot.wim where X is your DVD drive letter. Start, Deployment Tools Command Prompt, Ctrl+ Shift+ Enter. Open the Deployment Tools Command Prompt as an administrator. 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. 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). If it installs successfully, then check the System Properties inside the virtual machine. If it fails, then you have the 64-bit version and your computer doesn't support/have enabled Hardware-accelerated virtualization. This should work on any computer, even a Mac. 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. If your disk is 32-bit, it will look like above where it says (x86). You should see something like the following:ĭescription : Microsoft Windows Setup (x86) Type dism /Get-WimInfo /WimFile:X:\sources\boot.wim where X is your DVD drive's letter. Insert the Windows 7 DVD, and close any autoplay popup. Open a command prompt as an administrator. If you have administrator access to a system already running Windows 7 (this feature is not in Vista): In this case, this is a dual installer for both 32 bit and 64 bit processors, for Windows 7 Ultimate. Processor architecture is explicitly shown in the remainder of the WIM info. See Windows Version Numbers to lookup your version. Third and fourth dot pairs are Service Pack and Build info. 
Index : 2 Name : Windows 7 Ultimate Activated 64Bitĭescription : Windows 7 ULTIMATE Size : 12,075,969,989 bytes Index : 1 Name : Windows 7 Ultimate Activated 32Bitĭescription : Windows 7 ULTIMATE Size : 8,476,902,704 bytes (Replace f: with drive path to installer root).ĭeployment Image Servicing and Management toolĭetails for image : f:\sources\install.wim Type or paste: dism /get-wiminfo /wimfile:"f:\sources\install.wim".Click "Start", type "cmd", press "ENTER".
Best and quickest way to answer the question about both Processor architecture and Windows version is:
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