From the developer: Popup Purger is an intelligent popup blocker for Microsoft Internet Explorer that can block annoying popup ads before they open. With its SmartBlock Engine, Popup Purger can block unsolicited popup ads while never interfere with your normal navigation. Popup Purger can block pop-up, pop-under and web page dialog popup ads. With Popup Purger's Boss Keys, you can hide, show or close all IE windows immediately. Popup Purger also has a built-in clock synchronizer that can keep your system clock always exact.