ZapPop The Popup Killer is an Internet Explorer pop-up killer that prevents unwanted pop-up and pop-under windows as well as banner ads. There is no need to set up particular Web sites or keywords; ZapPop The Popup Killer works without any user intervention. It sits in the taskbar quietly until it detects a pop-up. It then intercepts the window, which never appears. You even have the option of hearing a pleasant "zap" sound each time the program goes to work for you. Each "zap" tells you that ZapPop has stopped one more annoying advertiser from interfering with your enjoyment of the Internet.