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Computer Virus
Chapter Profile
What is a Computer Virus? Types of Computer Viruses
How does a Computer get Infected with a Virus?
How do you know if your PC has a Virus?
How to protect your PC from a Virus? Malware
Antivirus Firewall
Data and information stored on a computer are two of the most important assets for an
organisation or an individual. No one wants to lose their data or information. Therefore, people
adopt preventive measures to protect their computer systems and data from any kind of threat
or risk. One common risks is a virus attack.
WHAT IS A COMPUTER VIRUS?
A computer virus is a ‘piece of code’ or program developed to corrupt data or program files
stored on a computer system. It enters in the computer without the user’s permission, and the
user may not even realise that the system is infected. Viruses typically infect only one computer.
However, if the computer is a part of a network, then the computer virus may spread to other
systems much like a human virus. Once a virus infects a computer, it can disrupt the normal
functioning of the computer's resources, such as processing power, memory, and installed
programs. A virus can slow down the computer's performance or even damage the hard disk
irreparably, leading to a loss of data.
VIRUS stands for Vital Information Resources Under Seize.
Harms Caused by Computer Viruses
Different viruses will affect your computer in different ways:
They can corrupt system files.
They can destroy some or all of your data.
They can decrease the processing speed of the computer.
They can reduce or block the memory of the computer or hard disk.
They can prevent you from restarting your computer or cause it to restart repeatedly.
They can send e-mails from your account without your knowledge.
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