To upgrade from XP to Vista with an Upgrade disk, you must start from within
a running XP installation, you cannot do it by booting to the Vista disk or
by "showing" the installer an XP disk as a qualifier.
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help - www.rickrogers.org
"Ed Pyle" wrote in message
>I am trying to upgrade XP to Vista. After the information gathering
> finishes I get a message to the effect that "upgrade installation
> disabled -
> cannot determine if another operating system is present - fix boot record
> run again". I do not have another operating system installed. Anyone
> what is going on here and how I should proceed? Thanks.