This document discusses different types of malware and protection methods. It covers the damages viruses can cause like displaying unwanted messages or deleting files. It then explains antivirus software detects and removes viruses and worms. Antispyware protects against unwanted programs and slow performance from spyware. Anti-worm software protects against self-replicating worms, while anti-trojan horse software detects and removes trojan horses and repairs damage. The document also notes John McAfee invented antivirus software in 1987.

2. Contents
1. Damages done by virus
2. Ways of preventing virus
3. Antivirus
4. Examples
5. Who discovered antivirus
6. Anti spyware
7. Anti-worm
8. Anti-Trojan Horse

3. Damages Done By Virus
• Sometimes display unwanted messages
• Some tend to destroy programs or data.
• Format hard disks, damage programs and
delete files
• Simply replicate themselves.
• Bug ridden, and these bugs may lead to
system crashes and data loss.

6. • A computer program that detects, prevents,
and takes action to disarm or remove
malicious software programs, such as viruses
and worms.
• Help protect your computer against viruses
by using antivirus software, such as
Microsoft security essentials.

8. Who discovered antivirus
• John McAfee
• Found McAfee.
• Develop virus scanner.
• Invented on 1957.

9. Antispyware
Protects from the
computer pop-ups
Protects from slow
performance
Protects security
treats caused by
SPYWARE.
Protects from
other unwanted
software

10. Anti-worm
•Anti-worm has multiple meanings within the field
of computer security.
It can be a piece of software designed to
protect against computer worms, combining the features
of anti virus software and a personal firewall.
It can also mean a worm
designed to do something that its author feels is
helpful.

11. Anti Trojan horse
•The purpose of anti-Trojan horse is
to provide information about
software that detects Trojan horses,
removes them and repairs damage
caused by them.
•An anti-Trojan product should be
used in addition to, but not instead
of, a security suite, antivirus, anti-
spyware or zero-day
protection software. After installing
anti-Trojan software, immediately
check for updates at the vendor's site
and turn on the auto update feature
(if it has one).