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I want to upgrade my computer to Windows 8 pro 64 bit. I currently have Windows 8 Pro 32 bit. I'm fine with re-installing. What I want to know is what is the cheapest process to do this?

I tried running the Windows 8 Upgrade Advisor and it said that it was not available in my country. I'm in the US. My guess is that it isn't designed for people already running Windows 8.

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Did the PC come with Win8 pre-installed? –  Karan Jun 26 '13 at 1:21
    
It came with Vista. I upgraded to Windows 8 using Upgrade Advisor and installed that on a new SSD. –  Aaron Kreider Jun 26 '13 at 1:26
    
Yep, as you noted you can easily run the Upgrade Assistant on a 64-bit PC, create the setup media and use that instead. If the PC had come with Win8 32-bit pre-installed, while the key embedded in the BIOS should work with the 64-bit version, the problem would have been laying your hands on the appropriate setup media. –  Karan Jun 26 '13 at 1:31

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It looks like I can use my existing license. I'll need to use a bootable USB drive or another computer (that is 64bit) and download Windows 8.

Download Windows 8

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Correct. Microsoft does not make 32-bit and 64-bit keys; Windows keys work for both versions. –  Darth Android Jun 26 '13 at 1:26
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It also looks like I can get a backup copy from Microsoft for $15 that includes both 32 and 64 bit versions. –  Aaron Kreider Jun 26 '13 at 1:30
    
The only thing to remember here is that you still only have one license. You don't get to install 32-bit on one machine and 64-bit on another. –  Joel Coehoorn Jun 28 '13 at 2:44

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