Types of Computer Viruses

More than 10 million computer viruses have infected computers in 1 year. That means an average of 27,397 computers are affected by computer viruses every year. Are you one of the computer virus victims? In this article, I will talk about the different types of computer viruses and what it can do to your computer.

Virus – A computer virus is a small but destructive piece of software that makes its way on your computer in a couple different ways:

Opening spam email from hackers and opening attachments from people you don’t know (A virus may be in the attachment)

Sharing media such as music, videos, or photos (A virus could attach itself onto your media)

Downloading free games and other applications from the internet (The app might be infected with a virus)

Once a virus finds a way to get in, a direct action virus will automatically act and start harming your computer. A memory-resident virus will wait until information is released. Either way, a virus is programmed to harm you in a couple different ways:

The most common reason why viruses infect your computer is because it wants to mail itself to other people in your address book by taking your information.

 Viruses might also want to delete your files or corrupt them so that they are not accessible.

You can read more on Webopedia or Webroot for more information about computer viruses.


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Worms – A worm is a very destructive type of virus that looks for any holes and bugs that aren’t secure in computer networks. Once a worm enters your computer, it copies itself to different computers in the network. While they are on your computer, they almost always do some damage to the computer. Many worms are created by hackers not to damage the computer, but to take control of the whole network.

Even though worms aren’t meant to damage the individual computer, it still causes some damage by disrupting the hardware in the computer and increasing network traffic.  


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Read this article on SearchSecurity for information about computer worms.

Trojan – A trojan horse is like a murderer on Halloween. It pretends to be something it isn’t, such as an application. It is actually extremely harmful to your computer and it can completely shut your computer down. They usually enter your computer by sneaking in through social media. Once they are on your computer, they shut down your systems, they can employ criminals to spy on you, and take your data.

There are different types of trojans meant to do different things to your computer. Some types of trojan horses including backdoors, exploit rootkits, and a lot of others for many different things.  

According to an article on SearchSecurity:

In computing, a Trojan horse is a program that appears harmless, but is, in fact, malicious. The term comes from Greek mythology about the Trojan War. According to legend, the Greeks built a large wooden horse that the people of Troy pulled into the city. During the night, soldiers who had been hiding inside the horse emerged, opened the city’s gates to let their fellow soldiers in and then overran the city.

You can read more on SearchSecurity and Kaspersky.  


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Check this video out about the difference between viruses, worms, and trojan horses: https://www.youtube.com/watch?v=y8a3QoTg4VQ

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