If your mouse scroll is not working to scroll pages ... This will turn Off the media mode and enable the normal mode of the mouse. If this does not work for you, try the next solution.

It’s always puzzled me why Windows users have had to resort to registry keys to change something as basic as mouse scrolling direction ... software that would enable this. Apple has had this ...

Adjust the trackpad settings in System Settings to enable tap-to-click and right-click with two fingers. Customize mouse scrolling, switching, and dragging preferences to mirror Windows functionality.