2. What are Computer Viruses
A virus is a man-made computer program
that infects a file or program on our
computers. It replicates or spreads itself
by infecting other programs on the same
computer.
3. Type of Virus
There are three type of Virus.
These are:
1. Trojan
2. Worms
3. Email Viruses
4. How Do We Protect Ourselves?
• Viruses and worms are detected and removed by
antivirus software. Example of antivirus are:
Bitdefender Antivirus Plus
Kaspersky Anti-Virus
Kaspersky Internet Security
Bitdefender Internet Security
AVG
Avast
Avira
Smartdav
5. Systom of Computer Viruses
1. Computer become very slow in
performance
2. Computer is truly dead
3. Computer is restarting every time.
6. How We Get Infected and The Effects
• Viruses and worms can infect network servers, desktop
computers, laptops, tablets and mobile 'phones... they pose
one of the most serious Internet security risks, reaching our
PCs from email, web sites, downloaded files and loadable
media, such as USBs, CD-ROMs and DVDs.
The virus or worm can,
Disable the computer
Add, modify or delete files or reformat the hard disk. A
worm eats up storage space and slows down the
computer, but won't alter or delete files.
Steal addresses held in our computer to send on virus-
infected emails to our friends, colleagues, clients or
customers