Yes. Dual-booting.
Search this newsgroup and Google. It's been covered a gazillion times.

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Maxwell Bluemeanie
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"idontknowtech" <idontknowtech.2mogzl@no-mx.forums.net> wrote in message
news:idontknowtech.2mogzl@no-mx.forums.net...[color=blue]
>
> I was wondering if it was possible to have 2 os's on the same computer.
> There are a bunch of programs that I want to use in xp that aren't yet
> vista compatible, and I don't feel like waiting another 6 months for
> them to work. But I also like using vista for other things too, and I
> realize it will be the norm one day so I don't want to get rid of it.
> So is it possible to have 2 operating systems like vista and xp on one
> computer? If you could point me to a good resource that would be
> great.
>
> Thankyou.
>
>
> --
> idontknowtech[/color]