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Windows Vista 32-bit to Windows 7 64-bit upgrade?

I erroneously installed windows 7 32 bit on a 64bit CPU. Is there any easy way to upgrade to 64 bit OS ?

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closed as exact duplicate by techie007, Mehper C. Palavuzlar, Hello71, afrazier, Gareth Aug 4 '11 at 16:54

This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question. See the FAQ for guidance on how to improve it.

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No, you must re-install. There is no upgrade path.

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can I re-install win 64 using the upgrade installation path or would I need to remove 32 bit OS and then install 64 bit OS or keep it as a separate installation? – user Aug 4 '11 at 15:51
@Marcos - You must reinstall. You can't do any kind of in-place upgrade. – Shinrai Aug 4 '11 at 15:55
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Wipe it and start over is the only path. – KCotreau Aug 4 '11 at 16:03
I am screwed up now, since I don't want to lose my data – user Aug 4 '11 at 18:15
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