Hi there, and welcome to JustAnswer, I look forward to assisting you today with your question and providing the best answer possible.
Are you recieving an error when opening Messenger?
If so, please tell me the exact error message
No..when I clilck on the icon..it doesn't react and doesn't come up
to be sure, this is MSN Messenger?
whoops..it is Yahoo. messenger
can you do the following please
downloda and install the trial version of Revo Uninstaller from here
Run this and uninstall anything to do with Yahoo MEssenger
once done, restart the computer and reinstall it
then try to open it please
let me know if you encounter any difficulties
and please remember to click Accept and take care