Typing by itself

Hello,

Hello plsssssss I have a problem with my computer in a form that when I want to type on the start button ( ]]]]]]]]]]]]]]]]) appeared frequently and when I want to launched my computer at the desktop it is another folder on the desktop that will be lunch the worse is that when I want to put my password it just started typing by itself in addition to that when I lunch msoffice it just start typing itself