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Computer Virus
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Learning Outcomes
What Is a Computer Virus? Types of Computer Virus
How Does a Computer Get Infected with a Virus?
How Do You Know Your PC Has a Virus? How to Prevent Your PC from a Virus?
Malware The Most Dangerous Malwares Known
Antivirus Firewall
Data and information stored on a computer are the two most important assets of an organisation
or individual. No one wants to lose their data and information. Hence, people adopt preventive
measures to protect their computer systems and data from any kind of danger or risk. One of the
common risks is a virus attack.
i + WHAT IS A COMPUTER VIRUS?
A computer virus is a type of unwanted computer program which is developed by miscreants
with an intention to infect the files of a computer, to corrupt a database or to hamper the
functioning of a computer system.
In a computer system, virus does not evolve by itself, it is uploaded or injected in a network or into
a storage media. It is communicable i.e., it is transmitted from one computer to another computer
or to a network by some medium of transmission like CDs, pen drive, external hard disk, softwares,
internet connection, bluetooth, etc. When infected, many viruses replicate by themselves.
There are different types of viruses that infect specific components or specific functioning of a
computer system. They can range in severity. Some may cause mild damages while others can
severely damage hardware, software or files. VIRUS stands for Vital Information Resources Under
Seize.
Harms Caused by Computer Viruses
Different viruses will affect your computer in different ways.
• They can crash your hard disk.
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Computer Virus

