I have a problem with my touchpad. It has four buttons, two above the touchpad (closest to screen) and two below. Normally I only use left lower button to highlight text etc. For some reason this no longer works and I have to now use the left upper button to do the same thing. I don't know how this changed itself. It seemed to happen when new windows updates installed but I am not sure of this. There is no option to re-configure the buttons in the mouse section of the control panel. I have tried installing updated touchpad drivers but that has no effect. I would be very grateful for any help as I can find no solution online.