1. Presentation by
Maunishka Malhotra
VII-B
G.D. GOENKA SCHOOL, ROHINI-22

2. INTRODUCTION TO
COMPUTER VIRUS
What is computer virus ?
Types of computer virus?
What a computer virus do?
•Prevention from computer virus
Best antivirus software.

3. What is computer
virus?
A computer virus is a software program with a
ability to make copies of itself ,which attacks
itself to other applications or files.

4. T H E R E A R E T H R E E T Y P E S O F C O M P U T E R V I R U S
BOOT VIRUS
PROGRAM VIRUS
MICRO VIRUS
Types of computervirus.

5. Boot viruses infects the boot records
of hard disk and floppy
disks.generally
These are considered more
dangerous than program viruses.

6. these viruses infects program files,whic
-h have extensions such as
.COM,.EXE.,SYS.,DLL,.OVL, or
.SCR.program files are attractive
targets for computer virus because
they are widely used and have
relativity,simple formates to which
viruses can attach themselves.

7. These viruses infects data files.for
example,microsoft,word document and
template files are suspectible to macro
virus attacks they spread rapidly as
infected documents are shared on
networks or downloaded from internet
sites.
Macro viruses

8. What a computer virus do?
a virus tries to take control of computer
system it has infected at the first
oppurtunity availible.it makes copies of
itself and also try to carry harmful task
written in its program.this process can
happen so quicly that the user is not even
aware of the presense of a virus in his/her
computer.

9. BEST ANTIVIRUS SOFTWARE.
Nortion antivirus.
Mcaffee virus scan
Kaspersky antivirus

10. Norton antivirus is a product of
symantec corporation.founded in 1982.
Notion check the following program
•Boot record s
•Programs(at the time you used them)
•All local hard drives,
•Files download from internet,
•Usbs(when in use)

12. Kaspersky ANTIVIRUS
Kespersky is product of kaspersky lab,
A russian computer security company,
•Co-founded by natalya kaspersky
antivirus,do the following things
•Invites virus scan by opening the kaspersky
antivirus window.

13. THANK YOU