Learn About Computer Viruses

Why should your PC be protected from computer Virus Threats

Learn The Basics Of Computer Viruses


downlaod virusIf you consider yourself a bit of a novice when it comes to computers then there are some things you should know about computer viruses and suchlike. What is a virus? Does your computer get sick?

Well, kind of. We often use the term Virus in a general sense for anything related to trojans, spyware etc but in actual fact there are specific names for different types of program. Virtually all of theprograms are written by programmers who are attempting various things. They may be trying to steal your personal information. They might try to watch the type of websites you visit and then send you unwanted advertisements. Some simply want to ruin your computer for the fun of it. The computer virus usually is a very clever, complicated piece of code that can violate your PC, cause system erros, crash your computer, and make it think you are allowing access to it. Because of all this, it is important to learn a few basics to stop it happening to you. Let's take a quick run down of the more common virus types.


The Virus Itself

A computer virus is a program that has the ability to copy itself and infect a computer without permission or knowledge of the user. Basically, once it get's onto your system it will copy itself onto other programs and keep replicating, often modifying itself along the way to prevent detection. The original virus may modify it's copies or the copies may modify themselves, This is known as metamorphic virus. A virus can only spread from one computer to another when its host, is taken to the uninfected computer, for instance, if you click a link in one of those junk emails, you may well end up being taken to a site that will download a virus. Viruses can also spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. This means that if a computer on a network, (such as a school or your local library) get's infected, then every computer linked to that one would also be infected.

The term Virus originates from the term virus in biology. A computer virus reproduces by making, possibly modified, copies of itself in the computer's memory, storage, or over a network. This is similar to the way a biological virus works.

Some viruses are programmed to damage your computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and perhaps make their presence known by presenting text, video, or audio, messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss.


Ok, let's look at Spyware. The definition of Spyware is any software that can covertly gather your information or data through your Internet connection without knowledge or consent. The reason for Spyware is usually for advertising purposes. Spyware applications are generally found hidden inside of free programs that can be downloaded from the internet. Once installed, the spyware will monitor your activity on the Internet and transmit that information in the background to someone else without you having a clue. Spyware can also gather information about e-mail addresses and even passwords and credit card numbers. It is also known as Adware. So, next time you download that free game, just be careful it doesn't contain any Spyware.

Trojans, (The Trojan Horse).

The Trojan horse, (or Trojan) is  is a program in which malicious or harmful code is hidden inside programming that seems harmless to the unsuspecting. It is done so in such a way such a way that it can get control and do its chosen form of damage, This is a particularly nasty application as it can ruin everything on your PC, including wipe your hard disk. A Trojan horse is often widely redistributed as part of a computer virus. This means that it can duplicate itself when attached to a computer virus.



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