Sureshot PopUp Killer is an aggressive pop-up stopper that prevents all pop-up windows as you surf the Web. It has full support for both pop-up and pop-under ads and will kill them even before they appear on your screen. To allow pop-up windows, you can temporarily disable PopUp Killer by holding the Control or Shift key. PopUp Killer can be configured to start automatically after a reboot and resides in the system tray when minimized. Sureshot PopUp Killer is compatible with the most popular Web browsers, such as Internet Explorer, Netscape Navigator, Opera, America Online, Mozilla, and NetCaptor. You can customize PopUp Killer to stop pop-ups from any Web browser.