Let me guide you how to remove Windows Live messenger always in task bar annoying you. Why it’s not appearing in your notification area rather than in taskbar. With this simple trick applied you can have Windows Live icon in notification area as in your previous version of Windows.
To do so, go to start, type Windows Live. In Windows Live messenger, right click and select properties.
In Window Live Messenger Properties, go to Compatibility tab and enable compatibility mode by choosing previous version of Windows, I chosed Windows XP SP3. Now click OK button.
Now you’ll see that Windows Live Messenger will appear in Notificaton area.