A computer virus is a program that can infect a system and quickly duplicate itself throughout the system. There are different types of computer viruses like boot viruses, file viruses, and macros viruses. Computer viruses can be gotten by using infected CDs or drives, opening infected email attachments, or downloading infected programs from the internet or other sources. Viruses can destroy the operating system, delete valuable data, decrease computer speed, and block computer memory. People should use anti-virus software, update it frequently, and avoid opening suspicious files or emails to prevent virus infections.

1. KNOWING
COMPUTER VIRUS

2. WHAT IS COMPUTER
VIRUS ?
A computer virus is a program that can
infect a system and quickly duplicate
itself throughout the system.

3. TYPE OF COMPUTER VIRUSES
BOOT VIRUSES
FILE VIRUSES
MACROS VIRUSES
INTERNET WORMS

4. HOW DO WE GET A
COMPUTER VIRUS?
 Using Virus infected CD’s or Pen Drives.
 Opening an infected e-mail attachment.
 Downloading an infected program from
Internet or CD’s.
 Through computer networks.
 Through Pirated Software.

5. EFFECTS OF COMPUTER
VIRUSES
 It can destroy your operating system.
 It can delete your valuable data.
 Decrease the processing speed of the
computer.
 It can block the memory of the
computer.
 Stops you to open your e-mail accounts.

6. HOW TO PREVENT A
VIRUS INVASION!
 Use only Legal software.
 Install an Anti Virus Program
 Update your anti virus program frequently.
 Scan your CD’s or Pen Drives with anti
virus program before using.
 Don’t open any unknown mail.
 Don’t download any music, games or file
from unknown source of Internet.