Have you ever had an advertisement pop-up out of nowhere on your desktop? This message was sent to your computer through a built in feature that Microsoft included in your copy of Windows 2000, NT, or XP. These types of spam messages are worse than unwanted e-mail since you dont even need to have an e-mail account or web browser.With Message Killer, you can block these unwanted messages forever with the click of a button! No longer do you have sit and wait as your computer freezes or crashes due to one of these messages. Message Killer will block each and every pop-up ad sent through Microsoft's Messenger Service.