Trilogy of Terror: Viruses, Worms and Trojan Horses

The most common blunder people make when the topic of a computer virus arises is to refer to a worm or Trojan horse as a virus. While the words Trojan, worm and virus are often used interchangeably, they are not exactly the same. Viruses, worms and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences among the three, and knowing those differences can help you to better protect your computer from their often damaging effects.

The Difference Between a Computer Virus, Worm and Trojan Horse
By Vangie Beal, Last updated November 07, 2007

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