The Internet is an integrating platform that has brought together the technologies of computing and communication to provide global connectivity and information. MSN Messenger now known as Windows Live messenger is a popular platform of Instant Messaging used by people across the world. It works with Windows XP/7/Vista, Blackberry, etc. It allows you to add contacts for Instant Messaging and delete contacts if you wish. If you want to delete an account in MSN version 7 for example, start MSN7, go to tools and select options. Select edit from the general tab to remove the account(s). You can also delete an account with Windows Live Messenger (latest version of MSN Messenger) via the control panel and settings.