Computer Viruses: How To Protect PC

Every one of us have probably faced computer viruses during the experience with computer.

What is their danger, how do they work, how to fight them?

JiJi is going to give you all of the answers!


What is a virus? PC virus is harmful software, capable of creating copies of itself and distributing itself in different directions (for instance, throughout the variety of media carriers).

First virus was created in 1986. It’s name was Brain, and the epidemy was lasting in 1987-1988. This virus was focused on IBM products, because they were the most wide-spread and common. Nowadays, specialists state that there are approximately 7 million viruses in the world (and thousands of them are created every day!).

What is the purpose of virus activity? The main goal is to steal personal information. Some additional include damaging computer as an act of vandalism, having fun for those who create viruses (yes, sometimes they simply entertain themselves) and so on.


Types of computer viruses

There is a great variety of viruses. Why? Because all of them act in a special way. Find out how!


The singularity of this virus is that it “pretends” to be a useful program: for instance, a new version of a kind of software and so on. But, unfortunately, they destroy the personal data on the PC customer.


The aim of this virus is to replicate itself in as many places as possible. Often it isn’t dangerous itself, but worm is used as a means of another virus to come and destroy your information or even hardware components.


Parasitic virus

This virus works with the program files and is devoted to spoil the working process of a program. Luckily, it’s easily noticed by special anti-viruses and deleted from computer.

Stealth virus

This kind of virus is quite dangerous and difficult to be identified. The principle of work is that is has the special algorithm of hiding it’s code and, moreover, changing it from time to time. That’s the reason why it can’t be simply found by anti-viruses.

These types are the most common, but, of course, we have mentioned a little particle of a vast number of these harmful programs. We hope you understand the principles of work, so let’s answer another question:

how to fight them?

 Types of anti-viruses

The thing is, that depending on the types of viruses, there is a vast variety of anti-viruses. They major in dealing with different kinds of harm for your computer, but nowadays most of them are able to identify at least the type of virus (but for healing another one may be needed).

Detector programs

These programs are able to analyse the codes of files and viruses, so that they give you the information about changing of code (and this is the virus activity). One great drawback – they can fight only very notorious viruses.

Doctor programs

They renew the files by destroying the virus part of them and rebuilding it in a correct way. The principle of work is that they compare the parts of code in different times. And when they notice the differences, they fight the virus.

Monitor programs

This kind of program is working as a mediator between your operation system and request from other programs asking permission for installation. They analyse these programs and allow them or not to be installed. Moreover, monitor programs are great for identifying newly-appeared viruses.


Most of the modern anti-viruses are modified and complicated versions of the mentioned types.

If you want to choose an appropriate anti-virus for yourself, think of how you use your PC.

For instance, if you are used to downloading files from Internet, choose Internet-editions of anti-viruses.

If you often utilize the USB-drives for transmitting information, you’d better use anti-viruses for general tasks.

The popular anti-virus programs are:

Avast Free Antivirus

Norton Security

Kaspersky Antivirus


If the problem occurred to your computer, don’t waste time (your files may be destroyed) – call the specialist!

Stay aware with JiJi!