I mistakenly punch the wrong keys on my computer and now it won't stop talking. i can't get the "text to speech whatever" to stop. it reads everything. the speech sub menu doesn't work on it. I don't see anything in the system preferences to make it stop. some one help.
I believe it is Command+F5. Or alternatively go into System Preferences > Universal Access. I believe it is the Voice over function you are referring to.
I remember when this happened to my Dad, he phoned me up very freaked out! Like pknz said, open up System Preferences/Universal Access and turn "Voice Over" off under the "Seeing" tab. Or just press command-F5. Edit: Very late to the game!