Apple Speak Problem

Hello, all i have a large problem every action when it comes to typing to switching programs in OSX the speak option has been activated this didnt happen until i downloaded the last revision of quick time 7.1. ITs really annoying and i have been to system prefrences to see if i accidentally clicked on something or did a short cut key. Has anyone had similar problems i have tried to reboot and has not worked. Could someone please help me out. BTW its on G5 iMac system