• User interface has been updated, including the toasts
• Sign-in screen has been restyled
• New program/tray icon
• Updated e-mail icon showing the number of new e-mails more clearly
• Updated Group window header
• SkyDrive officially replaces sharing folders feature (Actions > View your online files)
• Expanded What’s new area shows more details (eg. complete Tweets, added pictures, etc.) and Post a note has been updated for some items
• What’s new per contact in conversation window
• You cannot choose your own signature sound any longer. You can only assign signature sounds to your contacts
• Webcam snapshot has been renamed to Webcam Picture
• Tile with moods has been renamed to Dynamic Picture
• Modify moods, videos and/or pictures of previously made Dynamic Pictures
• Change scene option added to status dropdown list
• More default Scenes
• Updated and new static/animated display pictures featuring the Messenger buddy, Morty and Daisy
  Windows 7 Jumplists
• Save pictures presented through PhotoShare (Previous photo/Next photo/Save photo)
• What’s new list options accessible through an icon next to What’s new header, or from a button in Options > Layout

Download MSN messenger 2009 final

All you need to do is visit Windows Live Installer, uncheck the applications that you don’t want but keep the tick on Messenger and click install.