A Windows CD or DVD
Neither Boot Camp nor any of the Mac virtualization programs includes a copy of Windows; they merely provide an environment in which you can install and run Windows. So you'll need a Windows CD or DVD.
Which Version of Windows?
The first thing to decide is which version of Windows to use. For most people, that boils down to choosing one of the numerous flavors of Windows XP or Windows Vista. And you must also consider what kind of license that copy of Windows has.
Windows 7
As of publication time, Microsoft is working on the next generation of Windows, Windows 7, which was briefly available in a free public beta version. Microsoft claims that when it finally ships, Windows 7 will be faster, more reliable, and less resource-intensive ...
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