upgrading home premium to ultimate

I just got a new gateway computer and wanted to upgrade to Vista home
ultimate. It went through the whole process then comes up with the following
message:
"Windows could not configure one or more system components. To install
Windows, restart the computer and then restart the installation."
It then proceeds to go back to the Vista home premium version. I checked
with the upgrade advisor and it appears that the computer is satisfactory
for this upgrade. I cannot find any issue that prevents this, the system is
basic, without any extra hardware at the moment.

Anyone have similar issues?
Thanks for any replies,
Dana