This document discusses viruses and anti-viruses. It defines a computer virus as a small software program that spreads from computer to computer and interferes with operations. Viruses work by attaching themselves to other programs. An anti-virus is software that identifies and removes viruses and other malware. It examines files and compares them to virus definitions to detect infections. Common virus types include Trojans, boot sector viruses, and worms. Popular anti-virus software includes AVG, McAfee, and Norton, which regularly scan systems and delete any found viruses. The disadvantages of viruses are they can crash systems, delete files, slow computers down, and damage hardware. Anti-viruses provide protection from viruses and malware as well as

1. VIRUS & ANTI-VIRUS
VS

2. GROUP MEMBERS:
Shazaib Malik
2019-BT-CIVL-02
M Abdullah
2019-BT –CIVIL-10
M Shazaib
2019-BT-CIVIL-05
M Faisal H Q
2019-BT-CIVIL-26

3. CONTENT:
VIRUS:
 WHAT IS A COMPUTER VIRUS.
 HOW IT IS WORK.
 TYPES OF VIRUS.
 EXPLAIN THE TYPES OF VIRUSES.
 DISADVANTAGES.
ANATI-VIRUS:
 WHAT IS A COMPUTER ANTI-VIRUS.
 HOW IT IS WORK.
 TYPES OF VIRUS.
 EXPLAIN THE TYPES OF ANTI-VIRUSES.
 ADVANTAGES.

4. WHAT IS A COMPUTER VIRUS:
 Computer Viruses are small software programs that are
designed to spread from one computer to another and to
interfere with computer operation.

5. HOW IT IS WORK:
 A virus is a small piece of software that piggybacks on real programs.
For example, a virus might attach itself to a program such as a
spreadsheet program. Each time the spreadsheet program runs,
the virus runs, too, and it has the chance to reproduce (by attaching to
other programs) or wreak havoc

6. WHAT IS A COMPUTER ANTI-
VIRUS:
 An antivirus software is a computer
program that identifies and removes
computer viruses, and other malicious
software like Worms and Trojans from
an infected computer. Not only this, an
antivirus software also protects the
computer from further virus attacks.

7. HOW IT IS WORK:
 The antivirus software examines each
and every file in a computer.
 It also examines its content with the virus
definitions stored in its virus dictionary.
 A virus dictionary is an inbuilt file belonging
to an antivirus software that contains code identified
as a virus by the antivirus authors.

8. TYPES OF VIRUSES:
 Trojan Horse
 Boot Sector Virus.
 Worms.
 Polymorphic virus.
 Macro virus.
 Memory Resident Virus

9. EXPLAIN
THE
TYPES
OF
VIRUSES:

10. Trojan Horse:
 A Trojan is a program file that claims to
do something but it actually does something
that is not required. Trojans can be employed
by cyber-thieves and hackers trying to gain
access to users' systems. Users are typically
tricked by some form of social engineering into
loading and executing Trojans on their systems.

11. Boot Sector Virus:
 The boot sector virus copies the
virus code in the boot sector and that infects
a storage device's master boot record (MBR).
It is not mandatory that a boot sector virus
Successfully boot the victim's PC to infect it.
As a result, even non-bootable media can
trigger the spread of boot sector viruses.

12. Worms:
 Worms are program that replicate
and spread to other system. Worms
almost always cause at least some harm
to the network, even if only by consuming
bandwidth., whereas viruses almost always
corrupt or modify files on a targeted computer.

13. TYPES OF ANTI-VIRUS:
AVG
MCAFEE
NORTON
KASPERSKY
AD-AWARE

14. EXPLAIN
THE
TYPES
OF
VIRUSES.

15. AVG ANTI-VIRUS:
 AVG is one of the most popular antivirus
programs. It can also work with a number
of different Windows operating systems. It
Is scanning all the files on the computer at
regular intervals. Additionally, it has the
ability to quarantine virus files so that they
cannot do any harm before they can be
checked and deleted.

16. McAfee ANTI-VIRUS:
 McAfee Virus Scan has been another very
popular antivirus program on the market for
years. It is necessary to take out a subscription
to use McAfee, but it will give you access to
continuously updating virus protection.

17. NORTON ANTI-VIRUS:
 Norton programs are used by the majority of
computer users on the market, who pay an annual
fee for a subscription service. Norton Anti-Virus
and Norton Internet Security are software programs
that search the computer regularly and delete any
viruses that they find.

18. DISADVANTAGES OF VIRUS:
• Viruscancrashwindow.
• Viruscanremovewindowfilesduetothisthecomputersystemslow
down.
• viruscanstolethevaluabledataofyourcomputer.
• Duetosomevirusthehardwareofcomputersystemcannotwork
properly.

19. ADVANTAGES OF ANTI-VIRUS:
Protection from Viruses & Spyware. ...
Protection from Phishing Attacks. ...
Provides Robust Web Protection. ...
Provides quick scan of removable device. ...
Two-Way Firewall. ...
Block Ads and Spam Website. ...
Provides Password Protection. ...
Parental Control.

20. REFERENCES:
 WWW.GOOGLE.COM
 SLIDE SHARE WEB
 TECHWAL.COM
 WIKIPEDIA
 The Art of Deception. Kevin D. Mitnick. ...
 Sandworm. Andy Greenberg. 05 Nov 2019. ...
 Black Hat Python. Justin Seitz. 21 Jan 2015. …