hi, this is my first post here, i have a problem, some of the keys from my keyboard stop working, the f9, f10 f11 f12 f4, also the numbers 4, 6 and the bar space, esc key....a total mess, dont know if is hardware problem or something else, i already unplug and plug again, uninstalled and installed, used a restauration:upset: point...and its the same malfunction:upset: