Let me add one point in addition:
Logitech had no specific drivers for the KB330 that were labeled Win 10.
They stopped with Win 8.
My adult son, who loves tinkering with all sorts of electronic gadgest,
decided to experiment and download anything on the site that he thought
suddenly, the multimedia lights started blinking and we knew we had a hit.
That also prompted other links to pop up prompting to be downloaded.
And when the process was over, i had what I wanted and needed -- a master
volume control with a mute and a pause.