1.  INTRODUCTION TO VIRUSES
 SOME HARMFUL VIRUSES
 HOW DO VIRUSES ENTER COMPUTER?
 PREVENTION FROM VIRUSES
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2.  A computer virus is a computer program that
can replicate itself and spread from one
computer to another. The term "virus" is also
commonly, but erroneously, used to refer to
other types of malware, including but not
limited to adware and spyware programs that do
not have a reproductive ability.
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3.  The Morris worm
 The Concept virus
 CIH
 The Anna Kournikova worm
 ILOVEYOU
 The Melissa virus
 The Blaster Worm
 Net sky and Sasser
 OSX/RS Plug Trojan
 Storm worm 3
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4.  Viruses may be sent by opening email attachments, clicking
on spam, visiting corrupt websites and links online, opening
spreadsheets or even the original method—infected disks.
 Some aggressive viruses—such as the Melissa virus—
automatically duplicate copies of itself to the first 50 people in
your computer email address book. A frightening prospect—
opening an email from someone you trust to be greeted by a
virus.
 Even by downloading and uploading on internet things like:-
audio , video , images ,etc
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5.  Make sure that your operating system is up-to-date.
 Make sure to install the latest antivirus software and be sure to
download updates when they emerge.
 It also is a good idea to install a firewall for extra security and
protection.
 Instant Messenger can carry viruses, Trojan horses, and worms.
Don’t send files over IM and don’t open attachments or click on
Web links sent by someone you don’t know.
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6. HOPE YOU LIKE THE
PRESENTATION
THE END 2/5/2013
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