Strange pop-ups, unexpected apps and a mind-of-its-own webcam? Here’s how to tell if your computer has been hacked—and what to do about it. Internet users with lackluster security aren’t the only ones ...

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Realizing that your computer is infected with a virus can be a heart-stopping moment, but there's no need to panic. Viruses or other malware can have a devastating effect on your PC, slowing its ...