Live Notifier enlarge notification options of your Windows Live messenger, showing certain information not provided nt he original version.
Probably you have done it before, you open a chat conversation, but then, you think it better and close it writing nothing. Now you can know if a contact does it to you.
If they disadmit you from the contact list, youll be notified at the moment.
If you want to access these functions, once you have installed it access them in the menu options following this path: Messenger Plus! -> Live Notifier -> Settings. There youll be able to setup the Live Notifier.