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. Check the at comparison chart the vendor website to determine which one best suits your needs.