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I am getting ready to reformat my Bootcamp partition and installed Windows 7 Ultimate over Windows 7 Professional.

The thing is, down the line I probably need to reformat and reinstall OS X.

Can I reformat/reinstall OS X and not loose my bootcamp partition/Windows install?

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Is there a reason you're reformatting to upgrade from Win 7 Pro to Win 7 Ultimate instead of using the builtin upgrade? – Paul Whitehurst Oct 14 '10 at 15:59
up vote 2 down vote accepted

Yes. They're on separate partitions so you can upgrade them independently just fine.

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Yes, there is no trouble doing that at all. Just be sure to reformat and reinstall each respective OS to the correct partition.

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