What is a virus computer definition? History, Type of viruses,Virus Prevention and Detection:

The full name of VIRUS VIRUS is Vital Information Resource Under Seize. Viruses are small programs in a computer. Which are the Autoexecute Program which enter the computer and affect the functioning of the computer. They are called viruses.



What is a virus computer definition  History, Type of viruses,Virus Prevention and Detection

The way a virus enters the human body affects the human body, in the same way a computer virus in a computer. By entering, they affect the functioning of the computer. But these human bodies are completely different from viruses.

History :
The term virus in computer was first used by Fred Cochen, a student at the University of California. Did in his research paper. In this research paper it was shown how to write a program that in a computer. Enter and influence its functioning. The way the human body functions by entering the virus in the human body. Affects the system. In the 1980s, no one was known about the virus.

The modern virus is called C Brain. It was built in 1986 by two brothers from Pakistan, Basit and Amjad. Was. Both of them used to trade computer software. C Brain Virus did huge damage in the world. after this . Many viruses were produced. Which work in different ways.

Symptoms :
1. Computer speed slows down.
2. The function of the key board changes.
3. In this, the size of the file becomes more or less.
4. Useless information starts coming on the screen.
5. Formats the disk.
6. Builds files and folders and makes shortcuts.
7. Deletes the necessary information in the computer.
8. The computer starts restarting.
9. Reduces computer memory.
10. Prevents the program from running.

Reasons for spreading the virus:
1. By using stolen or fake software: - The software which is obtained illegally. It is called Pirated Software. This can be Software Virus.

2 . From the network: - Due to the virus coming in one computer in the computer network, the virus spreads in the whole computer of the entire network.

3. With CD and Pen Drive: - CD or pen for copying data from one computer to another. Let's use drive. Due to which the fear of spreading the virus remains. The computer from which the data is being copied. And if it has a virus, the virus spreads to other computers as well.

4. Internet: - Nowadays Internet is considered as the main carrier of virus. Virus Creator Virus. Use the Internet to spread. Which is a simple and cheap medium.

Types of viruses
Viruses are divided into several classes based on their function and principle. Which is as follows:


  • Boot Sector Virus: - This virus is saved in the boot sector area of ​​the disk and when the computer is started. goes . So this prevents the computer from starting. And obstruct computer work. this is very . There are dangerous viruses.



  • Partition table virus: - This virus damages the Partition Table of the disk. This makes the data There is no harm This reduces the capacity of REM. And problem in input and output devices.



  • File Virus: - These viruses affect the functioning of the computer by connecting with the files being implemented.



  • Stealth Virus: - This virus keeps trying to hide its identity according to its name. And damage the computer.



  • Polymorphic Virus: - This virus has the ability to replace itself repeatedly. So that it keeps itself in the computer for many days. And damage the computer. And they are difficult to detect. Because it happens in a completely new form every time.



  • Macro Virus: - It damages specific types of files. This data to MS Office Files. They cause damage and are hidden as a macro program.


The following is an introduction to some important viruses.


  • Michael Angelo Virus: - This virus damages the computer on 5 March, the birthday of Michael Angelo. Most computers in the world remain closed on this day. This virus only works for one day. . And causes great harm to the computer.



  • Disk washer: - This virus removes the data by formatting the disk. And later leaves a message. Disk washer with Love got its name based on its message.



  • Bomb: - A bomb is a program hidden in a normal program. The bomb is executed by an angry employee. There are also examples of bombs being placed in software. So that if the stolen software is used, the bomb will erase the copy from the hard disk. It ignores user bombs just like viruses and Trojans.



  • Trojans: - This is such a program. Those who claim to do some useful and beneficial work. And objects: When executed, damage the system. Some of these types of viruses do not do their job of getting infected but are activated after a particular date. And damage the computer. Such as formatting a hard disk.



  • Worms (Wom): - Wom resembles virus in a way. Because it also like viruses on its own. Has the ability to double. But it does not infect executable files. It tries to fill the hard disk by repeating its code faster.



  • Email Hoaxes (Email hoax): - This virus was a virus sent with the help of e-mail, this virus to the user. Reported to be. And it asks its friends to inform. While in reality nothing like this. This virus destroys the user's time and makes him mentally disturbed.



  • Companions: - This virus connects with executable files. And runs itself in place of files, which leads to dangerous results.


Virus Prevention and Detection:

Avoiding the virus is not a difficult task. For this, we need some information and some utility software. Should be used. 

Original antivirus should be used in computer. This software executes automatically and detects viruses. And remove it from the computer. The antivirus should be updated from time to time so that it can detect new viruses as well.

Nowadays many companies manufacture Antivirus in the market. From which buy Antivirus according to your needs. Tax should be used.

Some popular virus repellents are as follows.

McAfee Virus Scan, K5 Total Security, Nortron Anti Virus
Different Antivius have different characteristics.

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