Reinstalling Vista Ultimate Upgrade after Full factory recover

I upgraded from home premium to ultimate when I purchased HP Pavillion. I was
having trouble with printer recognition and some other things so I did a full
system recovery back to factory new. Now I want to reactivate upgrade that I
purchased for $200 back on the computer. How do I do this?

Have you checked you digital locker?
From Microsoft...
"A personal digital locker is created for you when you purchase a Windows
Vista upgrade. Your digital locker stores your product keys and purchase
information which, when used together, allow you to reinstall your upgrade
if necessary. A copy of your upgrade is also stored in your digital locker.

To access your upgrade in your digital locker for recovery:

Click Start, and then click Control Panel. Double-click the digital locker
icon. Alternatively, you can go directly to the Digital Locker website.
"
https://digitallocker.windowsmarketp...spx?limode=wau

"Robbie" <Robbie@discussions.microsoft.com> wrote in message
news:373F9501-BCBA-4ACC-8EBC-559DA2DEDE2C@microsoft.com...
>I upgraded from home premium to ultimate when I purchased HP Pavillion. I
>was
> having trouble with printer recognition and some other things so I did a
> full
> system recovery back to factory new. Now I want to reactivate upgrade
> that I
> purchased for $200 back on the computer. How do I do this?