It mystified me too at first. I spent ages fruitlessly trying to figure it out
I'm using windows xp on my U135dx. The U135DX is a great notebook btw, I'm sure your daughter will love it once she's over this little hiccup
I verified my webcam worked by clicking the start button then click on mycomputer the webcam is listed under scanners & cameras & opens when clicked.
I eventually discovered that the webcam opens automatically once I'd installed the webchat program (I use google voice & video). No need to use with Fn F6 keys.
Hopefully the same will work for too. Install the program your daughter & her friends intend to use. Then open the program as you would to use it & hopefully the webcam will light up. If it helps, Google voice & video has a self test function so you can check the camera and microphone are both working.
Hope this helps.