RC1 isn't an upgrade option for the Vista Upgrade disk. It's better to do
the clean install, although with the full version disk, it will allow the
upgrade.

--
Dustin Harper
dharper@vistarip.com
http://www.vistarip.com

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"Mary Mc" <MaryMc@discussions.microsoft.com> wrote in message
news:618EBC24-428A-473E-9F7A-31B2725E7628@microsoft.com...
>I am currently running Vista Ultimate (RC release 1) on one of my
>computers.
> It is the only OS on this computer. Do I need to do a clean istall or an
> upgrade? My suspiscion is a Clean Install.