What is Virus and Antivirus ,Who developed first Virus & Antivirus

What is Virus and Antivirus ,Who developed first Virus & Antivirus

What is Virus and Antivirus ?

A virus is a type of malware that is designed to replicate itself and spread to other computers. It can cause various types of damage, such as deleting files or stealing personal information. An antivirus is a program or software that is designed to detect and remove viruses from a computer or mobile device. It works by scanning files and identifying any that match the characteristics of known viruses, and then quarantining or removing them.



Antivirus software is an important tool for protecting a computer or mobile device from viruses and other types of malware. It can also help protect against phishing attempts, which are attempts to trick users into entering personal information or credentials on a fake website. Antivirus software works by scanning files and identifying any that match the characteristics of known viruses. Once a virus is detected, the software will either quarantine or remove it. Some antivirus programs also include additional features such as a firewall, which can help protect against hacking attempts, and a browser extension that can block malicious websites.




It is important to note that antivirus software is not 100% effective and new viruses are constantly being created, so it is important to keep the software updated to ensure that it can detect and remove the latest threats. Additionally, using good online safety practices, such as not clicking on links from unknown sources and being cautious about sharing personal information online, can also help reduce the risk of infection.

Types of Virus And Antivirus :

There are several different types of viruses, including:

File infectors: These viruses infect executable files and can spread through shared drives or removable media.




Boot-sector viruses: These viruses infect the boot sector of a hard drive and can spread through floppy disks or USB drives.




Macro viruses: These viruses infect documents and spreadsheets and can spread through email attachments or shared files.




Rootkit viruses: These viruses are designed to hide their presence on a computer, making them difficult to detect and remove.




Worms: These are self-replicating malware that spread through networks and can cause damage by consuming bandwidth or deleting files.




Ransomware: These are malware that encrypts a user's files and demands payment in exchange for the decryption key

Antivirus software can be broadly classified into two types:

Signature-based: These antivirus software use a database of known virus signatures to detect and remove viruses.

Behavior-based: These antivirus software monitor the behavior of programs and files on a computer, and flag anything that appears to be malicious.

It is important to note that new viruses are constantly being created and it is important to keep your antivirus software updated to ensure that it can detect and remove the latest threats. Additionally, using good online safety practices, such as not clicking on links from unknown sources and being cautious about sharing personal information online, can also help reduce the risk of infection.

Most famous Virus and Antivirus :

One of the most famous viruses is the WannaCry ransomware. It was first discovered in May 2017 and quickly spread across the world, encrypting the files of individuals and businesses and demanding a ransom in exchange for the decryption key. It was able to spread quickly due to a vulnerability in the Windows operating system that had been exploited by the National Security Agency (NSA) and then leaked by a hacking group called the Shadow Brokers.




A well-known example of antivirus software is Norton AntiVirus. It is a popular software developed and distributed by Symantec. It uses both signature-based and behavior-based detection methods to protect against viruses, malware, and other threats. It also includes additional features such as a firewall and a browser extension that can block malicious websites.




Another popular antivirus software is McAfee AntiVirus. Developed by McAfee, a subsidiary of Intel Security. It uses both signature-based and behavior-based detection methods to protect against viruses, malware, and other threats. It also includes additional features such as a firewall and a browser extension that can block malicious websites.




It's worth mentioning that there are many other well-known antivirus software like Kaspersky, Bitdefender, AVG, Avast, and many more, that are all known for their effectiveness in detecting and removing malware.

Who developed first Antivirus ?

The first known antivirus software was developed by Dr. Frederick Cohen in 1983 while he was a graduate student at the University of Southern California. The software, which he called "A Virus Program," was designed to detect and remove a type of computer virus called a "boot sector virus." Dr. Cohen's program was the first to use the concept of a "virus signature" to identify and remove malicious software.


It's worth noting that antivirus software has come a long way since then, with many different companies and researchers contributing to the development of modern antivirus software. Today's antivirus software is much more sophisticated and able to detect and remove a wider variety of malware threats than the first antivirus program.

 Who developed first Virus ?

The first known computer virus is believed to have been developed by two brothers, Basit and Amjad Farooq Alvi, in 1986. The virus, which they called "Brain," was designed to infect the boot sector of floppy disks and was spread by copying itself to any floppy disk that was inserted into an infected computer. The virus was not malicious and only displayed a message with the creators' contact information.


It's worth noting that the first known computer virus was created for educational purposes as a proof-of-concept, not for malicious intent. Since then, computer viruses have been developed with the intent of causing harm, such as stealing personal information, encrypting files and demanding a ransom, or even causing physical damage to hardware.