From the developer: "Popup Guard helps you block annoying popup windows when you're surfing the web, or using an application such as kazaa which opens additional popup windows. Speed up your browsing and avoid waisted bandwidth consumption. As an addon for Internet Explorer, Popup Guard intelligently identifies and blocks all unwanted popup windows before they load and you see them. Residing in your system tray with an icon, Popup Guard is easy to use, light to your system's resources, and requires no effort after installation."