The present invention relates to various aspects of managing display of supplemental on-screen windows known as popup windows. In one embodiment, an exemplary method includes detecting a first window on a screen, determining whether the first window qualifies as a popup window, and if the first window qualifies as a popup window, searching for other windows on the screen that satisfy certain testing conditions and closing the first window without a user request upon failing to find any other window on the screen that satisfies the testing conditions.