So these ads are a little old (about September I believe?), but they're absolutely adorable and I was thinking about them tonight. Windows 7 uses a sweet little girl, Kylie, to sell their product.
In the first ad with Kylie, she emailed some pictures, saying that she was only 4 - that's just how easy it is to use. The second one is my favorite, however. Kylie, despite her young age is able to make slideshows. Kylie copied and pasted the words that make her dad so happy (Windows 7 features copied from Gizmodo reviews), and put them into a slideshow with pictures of kittens and unicorns, things that make her happy.
She's so cute I could just eat her up.