How can I tell if a Windows 7 disk is 32bit or 64bit?

Sometimes you have a USB boot of Windows 7 or you have a Windows 7 DVD, but how do you actually identify if its a 32bit install or 64bit!

After searching around, I have found these 3 ways of doing it:

  1. Check the total size of the folders. 32bit Windows 7 is around 2.3GB, whereas 64bit Windows 7 is closer to 3GB
  2. Look for a file called bootmgr.efi in the root of the drive / volume. If you find it then you know its a 64bit install media
  3. The autorun.inf for 32bit install contains:

    The autorun.inf for 64bit install contains:

8 Responses to How can I tell if a Windows 7 disk is 32bit or 64bit?

  1. thanks great help

  2. thanks realy cleared it up for me:)

  3. Excellent article!!!… It helps a lot!!!

  4. That was so helpful

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