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Install Windows 7 x64 from USB Drive

I am currently running Windows 7 (Build 7201, 32-bit). I am facing a problem while performing a fresh install of Windows 7 RTM (64 bit) using an USB drive. To make the flash drive bootable, I need to run the bootsect utility. And it seems that you cannot run the 64-bit version of bootsect from inside a 32-bit host OS.

Any help would be appreciated.
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  1. Best answer
    I do not believe you can create a 64 bit install from a 32 bit version of the OS (or vice~versa, for that matter). There is a way around it using (a trial version of...) UltraISO.

    http://www.sevenforums.com/tutorials/2432-usb-windows-7-installation-key-drive-create.html?ltr=U
  2. Thanks a lot.

    The method #2 described on your link is exactly what I was trying to follow, and if you notice, they have clearly mentioned about the issue I am facing. :)

    Let me try method #1, and hope that it works!
  3. Method #1 worked!

    @Scotteq: Thanks a lot!

    @silversurfernhs: This link describes the method #2 mentioned by me above. It does not work across x86 and x64 (as in we cannot create a x64 windows usb while working in x86 windows).
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