Very few of us have a warm place in our hearts for browser windows that pop up in front of the screen without permission. The free Pop-Up Stopper prevents them (and pop-under windows) from displaying. You can have sounds notify you when a pop-up has been blocked. The program also allows you to briefly disable the blocking by double-clicking the system tray icon or by pressing Shift or Ctrl when following a new link. This version features a new ad-blocking technology, an improved interface, and more sound and visual options to play when an ad is blocked. This free version is one of four versions offered.