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Possible Duplicate:
Is the windows 8 upgrade 32 bit or 64bit

I just upgraded a 32 bit Vista machine to a 64 bit Windows 8 pro with discs I got thru mail order. I have another XP sp3 machine (32 bit) that is capable of a similar upgrade. To save a little money and time, can I upgrade to 64 bits with the upgrade assistant if I use the disc I already have? meaning - Do I get a general 32/64 bit activation code from the upgrade assistant, or is it 32 bit only, or is the activation code electronically included with the upgrade, as a download image. I've heard that the upgrade assistant would only give a 32 bit upgrade. I don't know how that part of the online process happens. Thanks for a good answer.

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marked as duplicate by Ƭᴇcʜιᴇ007, Dave M, Nifle, 8088, Simon Sheehan Dec 23 '12 at 2:16

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

The KEY you got is generic, valid for both 32 & 64 bit.

However, when you run the online web asistant in a 32-bit machine, it will run the 32-bit installer. There is no way to override this, nor workaround. Besides most probably the 64-bit executables from CD will not run on your 32-bit operating system (vista).

To upgrade from 32 to 64, you need to run clean installation, by booting directly from your new CD of 64 bits.

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