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Possible Duplicate:
How can I switch a 32-bit installation to a 64-bit one?

I have a 64-bit processor (Intel i3 second gen), and when I installed Ubuntu I went with the 32-bit version because I was just testing it, but now I see it is a lot better than Win7 and want to upgrade to the 64-bit version. Is there any way to do this without reinstalling? Thanks for the help!

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marked as duplicate by Mitch, Jjed, stephenmyall, Eliah Kagan, Tom Brossman Sep 13 '12 at 19:34

This question was marked as an exact duplicate of an existing question.

Have a look – ignite Sep 13 '12 at 2:35
To clarify, my answer (which the OP accepted) to the question @ignite has commented about is mostly theoretical. We may close this as a duplicate of that question, but please don't be fooled: the answer to "Can I upgrade from 32-bit to 64-bit" is almost certainly not. – Eliah Kagan Sep 13 '12 at 18:34

There's no way to "upgrade" your current installation of Ubuntu. You would need to reinstall. But you do not need to format the whole drive.

If you have done a /home partition, you can keep it, with all your files.

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