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![What is a Virus? Malicious programs that cause damage to](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-1.jpg)
What is a Virus?
Malicious programs that cause damage to your
computer, files
and information
They slow down the internet
Send themselves to your friends,
co-workers and the rest
of the web
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![Detention of Viruses Use all the free space in your](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-2.jpg)
Detention of Viruses
Use all the free space in your hard disk
Copy
of the infected file may be sent to all your addresses in your e-mail
Virus may delete your files and programs
Virus may reduce security
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![Examples of Viruses Worm Trojan Horse E-mail](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-3.jpg)
Examples of Viruses
Worm
Trojan Horse
E-mail
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![Worm Virus Designed to copy itself from machine to machine](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-4.jpg)
Worm Virus
Designed to copy itself from machine to machine
Worms move around
and infect other machines
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![Trojan Virus Computer program that appears to be useful but actually does damage](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-5.jpg)
Trojan Virus
Computer program that appears
to be useful but actually does damage
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![E-Mail Viruses Moves around in e-mail and mails itself to dozens of people](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-6.jpg)
E-Mail Viruses
Moves around in e-mail and mails
itself to dozens of people
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![Prevention of Viruses Run secure operating system like UNIX Virus](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-7.jpg)
Prevention of Viruses
Run secure operating system like UNIX
Virus Protection Software
Avoid Programs
from unknown sources
Install Macro Virus Protection
Disable floppy disk booting
Internet Firewall
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![Types of Anti-Viruses Virus Hunter Norton Antivirus Spy ware Doctor McAfee](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-8.jpg)
Types of Anti-Viruses
Virus Hunter
Norton Antivirus
Spy ware Doctor
McAfee
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![Data](/_ipx/f_webp&q_80&fit_contain&s_1440x1080/imagesDir/jpg/140529/slide-9.jpg)