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Legitimate Pop-upsĪn added complication in dealing with pop-ups is that many websites use them not for advertising but for legitimate purposes-for login windows, for example-or to display information you've requested. If you're unsure of which task corresponds to the pop-up, close all the browser tasks in the list. In the Task Manager, click the Applications tab, then select the pop-up window from the list and click the End Task button. Press simultaneously the CTRL, ALT, and DEL keys, and, from the resulting window, click the Task Manager button.
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If that doesn't work, you need to use the Windows Task Manager to close the pop-up. Right click on the button and select Close. Normally, the button and the pop-up will have the same title. To safely close a pop-up window, locate the button in your Taskbar that corresponds to the pop-up. Even buttons labeled "Cancel" or "Close" or a red-X button in the upper-right corner are dangerous to click doing so could trigger an infection-the opposite of what you'd expect. Specifically, you should never click anywhere in a pop-up window. To protect yourself from serious malware infection, you must be extraordinarily careful about how you close a pop-up window. Even if your browser is set to block pop-ups you're still going to get some because no pop-up blocker is perfect. Most are merely annoying but a significant number- such as the "Antivirus 2009" pop-up described below-are designed to infect your computer with spyware that makes your computer unusable. When you browse the web with a Windows computer you're sometimes presented with pop-up windows-and "pop-under" windows that you don't notice until you close your main browser window.