Mary--

My advice is not to upgrade from a Beta (RC1) that was released September 1,
2006 to an RTM that was released November 8, 2007. You have a much greater
chance of stability by either upgrading from a legacy OS, or better still
doing a full install.

CH

"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.