This question already has an answer here:
I bought a product key for Windows 8 a while ago, but I never got around to using it, because I can't seem to find a 64-bit Windows 8 ISO image anywhere.
My processor is 64-bit, but my current installation of Windows 7 is 32-bit, meaning that trying to upgrade from Windows 7 to Windows 8 through the upgrade Assistant would give me a 32-bit ISO image, which is not what I want. I want a 64-bit ISO image, so I can at least use my processor and memory to the fullest.
Where can I find a legitimate verbatim Windows 8 ISO image to use with my product key?
This is not a duplicate. The linked question does not answer me.