Hi Ed,

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
http://mvp.support.microsoft.com/
Windows help - www.rickrogers.org

"Ed Pyle" wrote in message
...
I am trying to upgrade XP to Vista. After the information gathering
process
finishes I get a message to the effect that "upgrade installation
disabled -
cannot determine if another operating system is present - fix boot record
and
run again". I do not have another operating system installed. Anyone
know
what is going on here and how I should proceed? Thanks.