A pop-up is a window that opens on your screen as you are viewing content on a website. Usually these pop-ups appear out of nowhere. A main reason you have a pop-up on your screen is that you have clicked a link on a web page. The pop-ups are usually a form of advertising. Some popups might display fake warnings that your computer is infected with a virus, tricking you into clicking a link to purchase their software. You can clear pop-ups by turning on the pop-up blocker built into the web browser you use.
Open Internet Explorer by clicking the icon on the desktop. Alternately, click the Windows-logo button, click "All Programs," and then click "Internet Explorer."
Click "Tools" from the menu bar at the top, and click "Pop-up Blocker." Click "Turn On Pop-up Blocker" from the side menu. Internet Explorer Pop-up blocker automatically turns on. Most pop-ups will be blocked with this setting.
Stop all pop-ups by clicking "Tools" from the menu bar at the top, click "Pop-up Blocker," and then click "Pop-up Blocker Settings." Select "High: Block all pop-ups" under Filter level. Click "Close" to save the settings.
Click the Firefox button at the top of the screen, and then click "Options."
Select the "Content" tab at the top. Check the "Block pop-up windows" check box.
Click the "Exceptions" button to add a site to the exceptions list. Enter the URL (web address) in the Address of Website field, and click "Close" to save the changes.