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Possible Duplicate:
How to upgrade from Windows 7 x86 to Windows 7 x64?

What's the [best] process to upgrade a computer from Win 7 x86 to Win 7 x64?

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marked as duplicate by Tom Wijsman, random Aug 16 '10 at 2:21

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.

Duplicate question, see my answer:… – Tom Wijsman Aug 16 '10 at 0:46

While there is no direct upgrade path across architectures, you can use Windows Easy Transfer on the 32-bit machine to transfer all of your files and settings to the 64-bit machine.

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You should remove old 32bit and install new 64bit version of Windows 7 in your system.

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