Viruses, worms and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences among the three.    One common mistake that 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 thing. 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 better protect your computer from their often damaging effects.    What Is a Virus?   A  computer  virus attaches itself to a  program  or  file  enabling it to spread from one computer to another, leaving infections as it travels. Like a human virus, a computer virus can range in severity: some may cause only mildly annoying effects while o...
 
 
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