The Popup Stopper review no pop-ups forever with the one and only pop-up stopper! Conclusions: Popup Stopper was a positive surprise, thumbs up for this one! Include the features you want in a popup killer, override mouse click, allow list and effectively kills pop-up and pop-under ads without introducing annoying side effects as by other popup killer software. Pop-up Popup Stopper is a pure popup killer and the price tag of $9.99 makes it one of the best deals out there. Highly recommended!