Does your laptop have a touchpad?

Sometimes the touchpad of a laptop will register a mouse click if any part of your hand brushes against the touchpad surface while typing. If the touchpad registers a mouseclick in the middle of sentance, the curser will move to whatever position that the mouse pointer is inline with/lined up with. Even if the pointer is not on the text/line that you are typing, it may register in the vertical position that the pointer is lined up with. My dads laptop does the same thing with the touchpad. Pretty annoying. It may be something that you can turn off in the laptop touchpad driver? maybe an option to not allow the touchpad to register mouse clicks? Try the dell CPi-a touchpad driver after installing the driver, or if you already have it, look in the control panel for the pointing device options related to the touchpad, see if there's an option to disable the mouse click feature.