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I want to install Windows-7 on a recent Mac Book Pro. I have a Windows-7 (32-bit) installation disc that I plan to use for the installation, using Bootcamp. However, I'm also thinking about getting a 64 bits version of the OS installation disc in a near future, because it is said to make a better use of the hardware.

If I install Windows-7 (32-bit) today and start to work with it, will I be able to upgrade to Windows-7 (64-bit) later ? when upgrading, is there a risk I could lose my previous work ?

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up vote 2 down vote accepted

You wont be able to upgrade in-place, however you can use Windows Easy Transfer to keep your files and some settings for a new install:

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Just to add emphasis, this is a restriction of Windows itself and nothing to do with Bootcamp. You cannot upgrade 32- to 64-bit on PC hardware either. – Shevek Jul 4 '11 at 11:21
Thanks Shevek, small world isn't it? :) – Ruairi Fullam Jul 4 '11 at 12:04
Thanks both for the answer and the additional information. – wil Jul 4 '11 at 12:29

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