What Is a Computer Virus? A computer virus is a program. Like other programs, it’s defined by what it does, and the big thing a virus does is replicate itself. The virus exists as a collection of ...

Windows users are encountering a new run of malware that is infecting their PC by impersonating some of the system's most ...

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 ...

It's important to know the signs of a virus, so that you can act quickly to get rid of any malware and stay safe in future. A virus is a type of malicious software, or malware, that can replicate ...

Think your PC might be doing more than you asked? Here’s how I check for hidden activity.

Emily Long is a freelance writer based in Salt Lake City. After graduating from Duke University, she spent several years reporting on the federal workforce for Government Executive, a publication of ...

Jeff Werner is a software engineer and has been writing this column since 2007. Scenario: You suddenly realize that the file you just downloaded, and opened, and ...

Even if you're cautious, there's always a chance that a virus could sneak onto your PC. Sure, Windows does have built-in security to block malware, but all it takes is one wrong click. Maybe it's a ...

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