(I haven't got a spare pc to install it which would nail the answer).

Someone has given me a bootable USB stick with Windows 10 on it. How can I determine from first principles whether it was created using a 32-bit iso or a 64-bit iso?

Strange question. I do not want to bias the answers I receive by revealing anything further at this stage, but will give more details when I feel I have a definitive answer.

Thank you!

  • That's a good link, but I'm asking about Windows 10. The efi method looks good but apparently depends on the architecture of the pc where the USB image was created. – kenmoorhouse Aug 19 '18 at 11:29
  • Did you read other answers? You can just check the sources/boot.wim file content with dism (builtin) or 7z. The structure for the install disk is the same in Windows 7 and 10. Or you can check any *.exe files in the disk are 32 or 64 bit using this way – phuclv Aug 19 '18 at 11:32
  • Ah, that looks better. I'll try that... – kenmoorhouse Aug 19 '18 at 11:35

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