MSN Instant Messenger could be legitimate Windows OS process. Shortcut via icon on taskbar in system tray to programs' settings/information/starting. MSN Instant Messenger comes with some versions of Windows and is used chat online with friends/family. MSN Instant Messenger is not to be confused (although similar) with Windows Instant Messenger. MSN Instant Messenger does not support Application Program Interfaces (API), and can not connect to intranets: Communication Service(audio available here) and Microsoft Exchange Instant Messaging. CAUTION: Various trojan/worm/spyware overwrite or create a file by this name.