First u have to do some tough job....
-->IF you installed the HP Hotkey Utility Driver installed, then uninstall it first.
-->Click the network Panel (monitor icon) in the taskbar.
-->Set Airplane Mode to OFF
-->Set Wi-Fi to ON
-->Restart your PC with the Wi-Fi ON
-->Now the thing that happens after your PC restarts, if you keep the airplane mode to ON the Wi-Fi stays OFF and if you keep the airplane mode to OFF Wi-Fi turns back ON. That means your Wi-Fi adapter is working properly. But the F12 button still doesn't work as the driver is not installed.
-->go to this link, http://ftp.hp.com/pub/softpaq/sp59501-60000/sp5983
-->download the HP Hotkey Utility Driver and install it..and see the magic..everything works fine.
Actually the main thing is that the airplane mode has to be always ON to keep the WiFi OFF and if you press Fn+F12 now the Airplane mode will turn OFF and Wi-Fi will turn ON or vice versa.
That's it...I think this will help...Thanx a lot.
Maruf