However, it is up to you to decide what is wanted and what is unwanted. For example, from the Contact List of Windows Live Messenger you may remove the Windows Live Logo, or the Messenger title, or the Display Picture Container, or the Personal Message Bar, the E-mail Button or all of them together. From the instant message window you may remove the Windows Live Logo, the Invite Button, the Send Files Button, and the Web Cam Button etc.
There are many options available with a facility to preview as you select the options. You can remove the advertisements and also open more than one messenger simultaneously.