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

Currently I installed Windows 8 Pro 32-bit. Is it possible to upgrade Windows 8 32-bit to 64-bit one? During installation I don't see any option to choose between 32-bit and 64-bit.

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marked as duplicate by Hennes, BBlake, 8088, Indrek, Siim K Dec 13 '12 at 8:31

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.

You will need to reinstall – Fergus Dec 12 '12 at 5:18
I think you choose 32-bit or 64-bit through selecting which DVD you put in the caddy. – Guy Thomas Dec 12 '12 at 21:15
@Hennes It is not asking the same question... I don't believe it's a VTC – Canadian Luke Dec 13 '12 at 0:57

No, because of the computer architecture. Those two setups are set on installation (how the CPU will treat the data, will it use 32-bit buses or 64-bit buses, addresses, etc.) and cannot be simply 'upgraded'.

You would need to reinstall the OS, as said above. In average system usage, there isn't much difference though.

Wikipedia has a good article on pros and cons - 64-bit vs 32-bit and describes the differences.

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It depends on how you define the average system. These days a desktop tends to have more than 4GB of RAM, and then it does make a difference. – Hennes Dec 12 '12 at 21:38
Indeed, that's completely true. Meant to say "for average user". – sachiel6 Dec 15 '12 at 19:44

I don't think so, but I found on the web this link...

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