FOR DELL MINI NETBOOKS that have function keys ( FN key) locked o stuck:
You need to press FN and the key that is next to your "space" key (between "space key" and "alt gr") simultaneously! (it's at the bottom of your keyboard, it has two little arrows on it).
It's a miracle! It works!!!!! I am spreading the word because I've been looking at websites fro the last three hours and no one had answers.
Your Function key will not be stuck anymore!!