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07 COMPUTER
VIRUS
Prime (Ver. 2.2)-VII Prime (Ver. 2.2)-VII Learning Objectives COMPUTER VIRUS
• What is a Computer Virus?
• Types of Computer Virus
• How does a Computer get Infected with
Virus?
• How do you know your PC has a Virus?
• How to Prevent your Computer from a
Virus?
80 Sometime, my saved files behave • Malware 81
80
abnormaly and display errors. I even • Antivirus
lost some data and information. What • Firewall
can I do to save my computer from these problems?
Data and information stored in the computer are the two most important
assets for everyone. Hence, most of the people adapt preventive measures
to protect their computer systems and data from any kind of danger or risk.
One of the common risks is virus attack. Let me explain.
What is a Computer Virus?
A computer virus is a ‘piece of code’ or program developed to corrupt the data or program
files stored in the computer system. It enters to the computer without permission of the
user. The user of the computer may not even realise that the computer is affected by a
virus. Viruses normally infect just 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 which
transmits from one person to another. After entering to the computer, they hampered the
normal functioning of the resources of computer such as processing power, memory and
installed programs. Sometime, a virus slows down the speed of computer or even damages the
hard disk of the computer completely which may not be recovered or repaired. VIRUS stands
for Vital Information Resources Under Seize.

