FN+F2 does not work. My wifi was still turned off. WiFi LED didn't turn on.
What I did was I uninstall few anoying games from my new laptop - so you would guess I'm a dumbass and uninstall something important.
But stop judging so quickly - after try to reinstall some packages from ASUS it did not help (but it's good to try especially if you don't know what you uninstall)
Anyway for me worked when I unistall wifi managers - "Boingo wi-fi" and "Wireless console 3". After taht my wifi could be turn on! So probably dumbass is someone else...