Microsoft has integrated Messenger into the latest version of Hotmail. If you don’t like being interupted by incoming chats while you’re trying to perform your email tasks, you can disable the integration.
1. Go to Windows Live Hotmail and login to your account.
2. Go to the upper-right corner and mouseover your name.
3. Select Sign out of Messenger.
You can easily enable the integrated Messenger by repeating the above steps and selecting Sign in to Messenger.
Disabling Messenger integration will have no impact on the Windows Live Messenger desktop client.