Recently, the f11 and f12 function keys stopped doing their job. When I press f11 (mute,) the loading symbol flashes next to the mouse pointer and nothing happens. When I press f12 ( WiFi toggle,) nothing happens at all. I thought this was a driver problem as the Toshiba function key driver was recently updated, but when I reverted back to the old driver the same thing happened. Any help would be greatly appreciated.