MSN Web Messenger
Just read that MSN Messenger is now available over any web browser using MSN Web Messenger. Now you can log into your Messenger account from any computer even if Messenger isn’t installed. The only thing that you may need to do is disable any pop-up blocking for that website in order to allow the program to function properly. It will also apparently only work on computers running Windows. It seems like Messenger is installed everywhere anyways these days, but for that odd time when it’s not and you need your instant-messaging fix, this is the answer!