VIRUS Full Form

A computer virus typically needs a host program to spread. It inserts its malicious code into this host program, establishing a strong foothold in the system. When the infected program is run, the virus activates first, potentially damaging files and disrupting the computer’s normal functioning. There are various types of computer viruses, and they can cause significant harm to important data, resulting in billions of dollars in economic losses worldwide.

What is the Full form of VIRUS?

In computer science, the full form of VIRUS is Vital Information Resources Under Siege. It refers to a type of malicious software that replicates itself and spreads across computer systems, often leading to data loss and software damage.

Viruses Full form History

The first study on computer viruses was conducted by John Von Neumann in 1949, where he developed a theoretical framework on self-replicating computer programs. While this was purely theoretical, in 1972, Veith Risak wrote an article in assembly language that included a working virus for the SIEMENS 4004/35 computer. Risak’s work was directly inspired by Von Neumann’s earlier research on self-replicating systems.

Do Check: List of all Important Full Forms

Parts of a Virus

Computer viruses come in different forms, each designed to harm systems in specific ways. Here are the common types of computer viruses you should know:

1. File Infector Virus- These viruses infect program files (especially .exe or .com files). When the program is run, the virus spreads and can corrupt other files or software.
2. Boot Sector Virus- This virus targets the boot sector of a storage device (like a hard drive or USB). It activates during computer startup, making it difficult to remove.
3. Macro Virus- Macro viruses infect files with macros (like Word or Excel documents). They spread through email attachments and downloaded files by executing scripts.
4. Polymorphic Virus- Polymorphic viruses change their code every time they spread, making them hard to detect with traditional antivirus programs.
5. Resident Virus- These viruses embed themselves into the computer’s memory, allowing them to infect files and programs even after the source of infection is removed.
6. Multipartite Virus- A hybrid virus that attacks in multiple ways — it can infect both files and the boot sector, making it more harmful and harder to eliminate.
7. Browser Hijacker- This virus modifies your web browser settings, redirecting you to malicious sites, showing unwanted ads, and slowing down browsing speed.
8. Direct Action Virus- These viruses act quickly, infecting specific files immediately after activation, but don’t typically stay in memory after the program closes.
9. Web Scripting Virus- They attack web browsers using malicious scripts embedded in websites, often leading to phishing attacks or malware downloads.

Phases of Virus

Computer viruses generally go through four main phases during their lifecycle:

1. Dormant Phase- In this initial stage, the virus remains inactive or hidden within the system. Although it has reached its target location inside the computer, it stays silent and does not perform any harmful activity. The virus waits for a specific trigger event (like a certain date or user action) to become active.
2. Propagation Phase- During the propagation phase, the virus starts replicating itself and spreads to other files or programs on the computer. It clones itself whenever files or programs are accessed, infecting more areas of the storage system and expanding its presence without being noticed.
3. Triggering Phase- In this phase, the virus that remained dormant and hidden gets activated. A specific trigger condition (like opening a particular program or reaching a date) causes the virus copies to become active and prepare for their intended malicious actions.
4. Execution Phase- This is the final and most damaging phase where the virus executes its harmful payload. It may perform activities such as deleting files, corrupting data, disabling programs, or even displaying annoying messages on the screen, leading to disruption and potential data loss.

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FAQs on Virus Full Form

What is the full form of computer virus?

The full form of VIRUS in computer science is Vital Information Resources Under Siege. It refers to malicious software that spreads by infecting programs or files, causing damage to computers.

What is the full word of virus?

The full word VIRUS stands for Vital Information Resources Under Siege, describing how viruses attack and disrupt computer systems by targeting valuable information.

What are the types of computer viruses?

There are several types of computer viruses, including: File Infector Virus Boot Sector Virus Macro Virus Polymorphic Virus Resident Virus Multipartite Virus Browser Hijacker Direct Action Virus Web Scripting Virus Trojan Horse

What are 10 common computer viruses?

Here are 10 well-known examples of computer viruses: ILOVEYOU Virus Mydoom Virus Melissa Virus CryptoLocker Ransomware Sasser Worm Zeus Trojan Conficker Worm Stuxnet Worm WannaCry Ransomware Code Red Worm