i have a macbook and few days ago i let my friend use it while i was away, anyway i don't know what he did, neither does he, but since then every time i click on something or have a window with text an annoying voice is reading the text and says everything i click on. so i really want to cancel it and i hope someone here can tell me how.
thanks in advance to all helpers.

System Settings->Universal Access->"Seeing" tab

Turn off Voice Over

thanks a lot u saved my mac