What is Virus and Type of Virus Full Details

What is computer virus and type of virus full details

Are you interested to know what is computer virus (Computer Virus ) All people come to use computer and those who use computer must have heard the name of virus.

Virus, this name is a very familiar name in the world of Internet. Along with this it is also a very scary name because it is very harmful for your computer and other electronic gadgets. That is, if it enters the system once, then it can also spoil it and can also destroy your data.
Just as viruses are not good for our health and they spread many diseases in our body, in the same way these viruses also cause many damages in the computer system. Therefore, it is good for all computer users to have information about them.Many people will also know something about Computer Virus in Hindi, what it is and what it does. But there are many people who must have heard the name of the virus but they will not know what the virus can do in your computer.
So today in this article I am going to tell you about what is a virus and how to eliminate the virus. Hope you will get to know a lot by reading this article.

Topics

• What is Computer Virus
• History of computer virus
• What can computer viruses do
• What is Malware
• Types of Malware
• What is Virus
• Type of virus
• Boot Sector Virus
• Direct Action Virus
• Resident Virus
• Multipartite Virus
• Polymorphic Virus
• Overwrite Virus
• File infectors Virus
• Macro viruses
• Overwrite Viruses
• Polymorphic Viruses
• Resident Viruses
• Rootkit Viruses
• System or Boot-record Infectors Viruses
• What is Worms
• What is Trojan Horse
• Signs of Virus Infection in the System
• How to Protect Your System from Viruses and Worms
• Should should not
• What did you learn today

What is Computer Virus

Computer Virus is a small software program that is designed to destroy or damage the operation of your computer and the data of the computer.
Computer virus without our knowledge can spoil the system in such a way that it is not just about us to fix it. The computer runs from many software programs only, without any program the computer cannot work.

Software programs are made to make the computer work properly and some programs are also made to spoil the work of the computer.
Computer was invented by man, man made his program to run the computer and as I said virus is also a small program, he has also been made by man. Computer virus is not natural, it is not made by itself, it is also created by programmers deliberately so that they can spoil other computers.
Or we can also say that Viruses are actually computer programs that are destructive rather than productive. Its basic purpose is to deliver damage to the place of providing help.

History of computer virus

Robert Thomas, he was the first engineer who first developed a computer virus while working at BBN Technologies in the year 1971.

This first virus was named “Creeper” virus, and it was an experimental program that Thomas G himself did to infect the mainframes of ARPANET. After infecting this virus system, it used to display the following message on the screen, “I’m the creeper: Catch me if you can.”
The original wild computer virus that was first tracked in the history of the entire computer virus was “Elk Cloner.” This Elk Cloner had previously infected Apple II operating systems through floppy disks. This virus was developed by Richard Skrenta in 1982, which was a teenager at that time.

Suppose that computer viruses were designed according to prank, but it seems that if a malicious program is installed in the memory of the computer then it can do many such things by running the system to the user. They can also stop further and they will not have the slightest control over these malicious programs.

The first person to name these Malicious Programs as “Computer Virus” was Fred Cohen, who named it in the year 1983. This name came to the fore when he named these programs in one of his academic paper titled “Computer Viruses – Theory and Experiments” where he wrote complete information about these malicious programs like how it works, what is it can do etc.

What can computer viruses do

Computer virus can corrupt or delete the data present in the computer. You can completely eliminate the data stored in your hard disk. Computer viruses also spoil their computers by going to other computers through e-mail attachments.
Virus greatly slows down the speed of your computer. It destroys your files and programs.

What is Malware

Malware’s full name is malicious software. This is also a software program that harms computers. Malicious software means bad software which is not good at all and once it comes in your system, it can completely spoil your system.
Malware is also the name of a virus that slowly starts destroying the data of your system.

Where does malware come from in our computer? Malware can come from many places in our system and the most used source which is common source today is internet.
On the Internet, we get some information every day. If we go to any malicious site to get the same information or download pirated software, games and movies from anywhere, then from there malware comes into our computer.

This was about how online malware gets into our computer, now we will know how offline malware gets into our computer.
We all use Pendrive, CDs, DVDs in our computers. When we connect Pendrive and CDs to our computer to take data from other places, then malware comes from all these things in our computer and our computer destroy data.

Types of Malware

There are three types of malware – Virus, Worms and Trojan horse. These three are different, their work is also different. These three spoil your computer in different ways. Let us know about these three, what they do.

What is Virus

Virus can corrupt the files and software present in your computer. Suppose there is a word document in your system in which virus has come, then it will delete the data of your document or it will corrupt that document so that you will not be able to get any information from it.
Or it could also be that this virus can completely corrupt your word processing software. In such a situation, if you copy or share a corrupted file, then this virus goes to another computer and also spoils its system.

Type of virus

Computer virus is a type of malware that if entered into the computer’s memory, then it can multiply itself automatically and can also change programs, applications.
Here computers are infected when these malicious codes keep on replicating themselves. Here I am going to provide you people with information about the types of these Computer Viruses.

Boot Sector Virus

This type of virus infects the master boot record and it is very difficult to remove them and often the system has to be formatted to remove them. They are mainly spread through removable media.

Direct Action Virus

These are also called non-resident viruses, once it is installed, it remains hidden in the computer memory. It stays attached to those specific types of files that it infects. They do not infect user experience and system’s performance.

Resident Virus

Like direct action viruses, resident viruses are also installed in the computer. Apart from this, identifying them is also a smile.

Multipartite Virus

This type of virus can affect the system in multiple ways. Both of these infect boot sector and executable files together.

Polymorphic Virus

Identifying these types of viruses is very difficult for a traditional anti-virus program, because these viruses change their signature pattern frequently whenever they replicate themselves.

Overwrite Virus

This type of virus deletes all the files that they infect. To remove these viruses from the system, the user has to delete all the infected files, which causes data loss.
It is very difficult to identify these viruses because they are spread through emails.
Spacefiller Virus – Also called “Cavity Viruses“. They have been given this name because it fills all the spaces in the code, so it does not harm the files.

File infectors Virus

Some file infector viruses attach to program files, such as .com or .exe files. Some file infector viruses also infect files with .sys, .ovl, .prg, and .mnu.
In the same way when a particular program is also loaded, the virus also gets loaded automatically. These viruses come in the users’ computer with email.

Macro viruses

As suggested in the name, these macro viruses mainly target macro language commands only in some applications like Microsoft Word.
These macro viruses are designed in such a way that they easily add their malicious code to genuine macro sequences.

Overwrite Viruses

This virus has been designed in such a way that it can overwrite itself and destroy any file or application data. Once it starts the attack, it starts overwriting its own code.

Polymorphic Viruses

This type of virus is used by more cybercriminals. This is a type of malware type that can easily change or mutate its underlying code and without changing any basic functions or features.
With this, it does not even come under the grip of which anti-malware. Whenever an anti malware detects it, it modifies itself which makes it very difficult to catch it.

Resident Viruses

This virus implants itself in the memory of the computer. Basically, there is no need of original virus program for infection to infect any files or program. Even if we delete the original virus, a version of it is stored in memory, which itself activates itself.
This happens when computer OSs load some applications or functions. Since it is hidden in the system’s RAM, it is often not able to detect any antivirus or antimalware.

Rootkit Viruses

This rootkit virus is a type of malware type that secretly installs an illegal rootkit in the infected system. With this, it opens a door for attackers who give them full control over the system.
This allows the attacker to fundamentally modify or disable a program or function. These rootkit virus can bypass antivirus software very easily. A Rootkit scanner is needed to catch them.

System or Boot-record Infectors Viruses

These Boot-record Infectors infect the executable code which is found in specific system areas of the disk. As the name suggests, they infect more in USB thumb drives and DOS boot sector.
These boot viruses are not seen much nowadays because the current systems do not depend on much physical storage media.

What is Worms

Worms are also like viruses but they multiply themselves and try to spread themselves as much as possible. Which means that if there are worms in your system, then they start making many copies of different files, due to which the system slows down.
If we copy and share the same files with another computer, then worms will go there and slow down that computer by making many copies of files.

What is Trojan Horse

Trojan Horse is a very dangerous malware. These malware come by hiding your identity in your computer.
For example, if you are using the internet and you have visited a site, there is an add such as “click here to win smartphone” and if you click on it, then trojan horse malware comes into your computer only through it. Will go and you will not even know about it and your system will completely ruin it.
They are also present on the internet in the form of many software, you will feel that it is genuine software but in reality it remains a trojan, which is hidden inside that software and once it comes in your computer, then it is your computer. start slowing down. With that, he would open a door so that different kinds of viruses and worms get into your computer.

Signs of Virus Infection in the System

How to know if your system is infected with Virus or not. That is why I am going to tell you about some warning signs below, which is very important to know for all computer users –

• Slower system performance
• Frequent pop-ups in the screen
• Programs running on their own
• Files automatically multiplying / duplicating
• Automatically install new files and programs on the computer
• Files, folders or programs are automatically deleted and corrupted
• Hard drive Awkward sound

If you show such warnings in your system then you should know that your system can be infected by virus. Therefore, soon download and scan a good antivirus software.

How to Protect Your System from Viruses and Worms

Here I am going to give you some such tips that will make it easier for you to avoid these viruses.
what should be done

• Always install a good antivirus in your system and keep updating it from time to time.
• If you do not have any information about his sender, then you should not open it.
• Do not download anything from Unauthorized Websites such as MP3, Movies, Software etc.
• Get all the downloaded things scanned thoroughly. Because there is more possibility of having virus in them.
• Removable Media such as pendrive, use only after scanning the disks.
• If you visit any website, then one thing should be kept in mind that it is a popular and registered website and do not click on any such link, which will cause you trouble later.

Should should not

• Never open any email attachment that you do not know about that sender.
• Do not try to open any unsolicited executable files, documents, spreadsheets, without scanning.
• Do not download documents or executable software from untrusted websites.
• Those who lure you to click here and win the lottery, then never click on such adds. We get similar greed in our e-mails too, so you should never open that mail as there are more chances of malware in it.

What did you learn today

I hope you must have liked my article, What is Computer Virus – What is Computer Virus in Hindi. It has always been my endeavor to provide complete information about the type of virus to the readers, so that they do not have to search in any other sites or internet in the context of that article.
This will also save their time and they will also get all the information in one place. If you have any doubts about this article or you want that there should be some improvement in it, then you can write low comments for this.

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