For all of you using Microsoft Instant Messenger as your chatting platform, you should change your messenger with Skype. According to the next web, Microsoft has sent an email to their users about this situation.
The Instant Messenger will be officially retired on March, 15 2013. And you will be migrated to Skype. But you shouldn’t worry about how it works. Microsoft will offer you to merge your account, and you have to download the Skype. And you can log in with your Microsoft account, and you’ll find all your contacts there.
You can still use the Messenger until the day and you can find the banner to upgrade, when you click it, you’ll be brought to the installer of Skype, and after the installation finishes, your Messenger will be automatically uninstalled of your computer.