Didn't Viao's Copy Of Windows Vista

Vaio Laptop that was in desperate need of a wipe and reinstall. Unfortunately she didn't know where her Vaio's copy of Windows Vista Premium was. While I was at my campus bookstore, I asked them if they had a copy of just the media itself as I already had my sister's Vaio license. They sold me a copy of the Ultimate version for $20 or $40 dollars, I don't remember how much exactly. I knew that the Ultimate version had all the versions, including the Premium version my sister had a license for. I used Magical Jelly Bean Keyfinder to look up her license which I e-mailed to myself. I reinstalled Vista which installed as the Premium version, just as I expected. Five to six hours later I had everything set up. I thought everything was activated and working just fine. I was wrong.

And now a week later, my sister brings me her laptop and complains herbackground is gone. The operating system had reverted itself to its limited "Illegal State". Frustrated and not wanting to spend another five hours redoing it all, I tried using the license that came on the back of the CD that I got at my campus bookstore which Windows refused. It won't allow me to upgrade to Ultimate either. What is my best solution at this point? Will Microsoft support me in this? Can I get a disc replacement from Vaio? The last thing we want to do is have to buy another license. I don't know if if its okay to use the license that came on the back of my Ultimate disc either.