When i connect to the internet the old windows messenger keeps loging its self in automacicly so people just start talking to me, how do i get this to stop.

Please do not post your subject in full caps and make it a little more descriptive next time

If you just wish to eradicate Windows Messenger completely, take a look at CookieRevised's reply to I am about to rip my hair out over MS Messanger. If you're looking for a more simply solution, have you tried opening Windows Messenger, going to the Options dialog and disabling the "Sign me in automatically" option?