A mouse is a device which is supplied with the computer to control a cursor and manipulate commands without the need for complex keyboard commands. The mouse was initially called as the X-Y Position Indicator for a given computer system. Each mouse has either two or three separate buttons which are the left button, right button, and an optional middle button or a mouse wheel which is located in the center of the right and left buttons. A few Apple models just come with a single button mouse. Problems can occur any where with the computer mouse and its operating parts, and this should help you in dealing with a few of the more common problems which creep in.