From viruses to spyware, we break down the key differences so you know exactly what you're dealing with.

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 ...

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 ...

When the IBM PC was new, I served as the president of the San Francisco PC User Group for three years. That’s how I met PCMag’s editorial team, who brought me on board in 1986. In the years since that ...

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 ...

Malware can cripple a computer, steal personal data, and compromise security, yet protection doesn't always require paid software. By combining built-in tools, safe browsing habits, and free antivirus ...

Malware has become a prevalent part of the online ecosystem. It's become so bad, in fact, that the FBI has even warned Americans to replace certain wi-fi routers in the past, to help avoid known ...