Why does my screen jerk when rolling up or down with mouse
the screen hesitates and then jerks up or down
Sometimes a jumping or hesitant computer screen occurs because the cable connecting the monitor to your CPU has become loose or damaged, preventing proper communication and data relay. The mouse might also be problematic. Check out http://www.ehow.com/how_6316113_fix-scrolling-problems-internet-explorer.html for more on this.