Often when I am using the wheel on my mouse to scroll on a page this icon pops up and suddenly the page whips by at high speed and I lose my place. I know some brilliant fellow developed this to be a convenience but it is extremely frustrating to me. Maybe I just don't have the manual dexterity to take advantage of it but I would like to know how to shut it off. It looks like the round center part of the image below with the dot and two arrows and is fairly small on the screen maybe half 3/8-inch wide.