WINDOWS LIVE MESSENGER is the world’s best-known messaging network and this latest version contains major changes with the respect to the previous one, such as:
Grouping conversations by tab
Keyboard shortcut creation
Encryption of saved conversations
Notification of new messages in several email accounts
Offline messages: you can chat with other connected users when you are offline and can send messages to offline users. Users receive offline messages upon reconnection. It acts as a sort of answer phone.
Voice and video calls to other PCs and mobile and landline telephones. You can chat with your contacts at a reduced price.
Folders to share files.
In addition to these new features, Windows Live Messenger offers a free antivirus service that analyses all transferred files.