Pop-up blocker is a feature of Internet Explorer (IE) 7+. It enables users to block most pop-ups while they are surfing the Internet on their computers. Users can choose the level of blocking. They can either block all pop-up windows or allow pop-ups they want to see. By default, the pop-up blocker is enabled in IE 7+. While the pop-up blocker is enabled, a user can see the blocked pop-ups by clicking the IE 7+ information bar.