Get this update for your Logitech keyboard.

What´s new
Support for the F-lock functions on the Elite™ keyboard, Cordless Navigator Duo™, Access™ keyboard, Cordless Access Duo™ and Cordless Elite Duo™.
An updated user interface that is easier and friendlier to use than previous versions.
Alternative drivers to Logitech iTouch Keyboard Drivers v2.15 build 264: