this is your control panel views

((((num1))) if you have classic view left click programs and features left click to open>>>>left click yahoo to unistall

or

(((num2))) if you have the Control Panel Home below
program left click ((uninstall a program)) delete yahoo there

{ now go back to start left click ((( search ))) }
{ type in yahoo delete all yahoo files there }

restart your pc

go to http://www.ancient version yahoo courier .com get an grown-up version