Open your settings or control panel and toggle your mouse preferences. Update (05/30/2020): Only thing I can think maybe update the driver, or try a different USB port to rule out a bad port
Those are fractures caused by pressure. Though you haven’t dropped it, the screen could crack from placing it in your back pocket, then putting your weight into it. Even placing it it inside a coat pocket Or purse could potentially fracture it if it knocked up against something more dense. Placing it face down On top of a raised area will leverage a bend in the glass causing it to fracture, as well. Though anything could cause it, the crack is on the underside of the device.
