Popup Purger Pro is an intelligent popup killer for Internet Explorer and MSN Explorer that can block annoying popup/under ads before they even open. It features a SmartBlock Engine, that blocks unsolicited popup ads but never interferes with your normal navigation. In addition to the popup/under blocking, the program can also block web page dialogs, in-your-face floating ads, messenger spams and more than 300 spywares embedded in the homepage.