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COMPUTER APPLICATION
Assignment
Work on
Microsoft
PowerPoint
2010 on the
topic
Submitted by,
QURAT UL AIN
NAEEM
Department,
Education, UOK
What Is Computer Virus..??
A computer virus is a small software
program that spreads from one
computer to another computer and
that interferes with computer
operation.
A computer virus may corrupt or
delete data on a computer, use an
e-mail program to spread the virus
to other computers, or even delete
everything on the hard disk.
These viruses infect disc boot
records or master boot records in
hard disks. They replace the boot
record program, copying it
elsewhere on the disk or
overwriting it. Boot viruses load
into memory if the computer tries
to read the disk while it is
booting.
Examples: Form, Disk Killer,
Michelangelo, and Stone
virus
These infect executable
program files, such as those
with extensions like
.BIN, .COM, .EXE, .OVL, .DRV
(driver) and .SYS (device
driver). These programs are
loaded in memory during
execution, taking the virus with
them. The virus becomes active
in memory, making copies of
itself and infecting files on disk.
Examples: Sunday, Cascade
Types Of Viruses
•Boot viruses
•Program
viruses
• Multipartite
viruses
They infect
program files and
when the infected
program is
executed, these
viruses infect the
boot record. When
you boot the
computer next time
the virus from the
boot record loads
in memory and
then starts
infecting other
program files on
disk.
Examples:
Invader, Flip,
Tequila
• Macro viruses • Active x
virusesIt is a new type of computer
virus that infects the macros
within a document or
template. When you open a
word processing or
spreadsheet document, the
macro virus is activated and
it infects the Normal
template (Normal.dot)-a
general purpose file that
stores default document
formatting settings.
Examples:
DMV, Nuclear,
Word Concept.
ActiveX and Java
controls will soon be the
scourge of computing.
Most people do not
know how to control
there web browser to
enable or disable the
various functions like
playing sound or video
and so, by default, leave
a nice big hole in
the security by
allowing
applets free
run into
there
machine.
How Do Computer Viruses
Spread?
Computer viruses usually spread in one of the three ways
E-mail
Virus..
Removable Disc
How To Remove A Computer Virus
Install and Update the
antivirus software on the
computer. Then, perform a
thorough scan of the computer
by using the antivirus software.
Install the latest updates from
Microsoft Update on the
computer.
Download, install, and then
run the Malicious Software
Removal Tool to remove
existing viruses on the
computer. To download the
Malicious software removal too.
How To Scan A Computer For Viruses..!!!
How To Protect Your Computer
Against Viruses
On the computer, turn on the firewall
Keep the computer
operating system up to date
Use updated antivirus software
on the computer
Conclusion..!!

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Computer Virus.

  • 1. COMPUTER APPLICATION Assignment Work on Microsoft PowerPoint 2010 on the topic Submitted by, QURAT UL AIN NAEEM Department, Education, UOK
  • 2. What Is Computer Virus..?? A computer virus is a small software program that spreads from one computer to another computer and that interferes with computer operation. A computer virus may corrupt or delete data on a computer, use an e-mail program to spread the virus to other computers, or even delete everything on the hard disk.
  • 3. These viruses infect disc boot records or master boot records in hard disks. They replace the boot record program, copying it elsewhere on the disk or overwriting it. Boot viruses load into memory if the computer tries to read the disk while it is booting. Examples: Form, Disk Killer, Michelangelo, and Stone virus These infect executable program files, such as those with extensions like .BIN, .COM, .EXE, .OVL, .DRV (driver) and .SYS (device driver). These programs are loaded in memory during execution, taking the virus with them. The virus becomes active in memory, making copies of itself and infecting files on disk. Examples: Sunday, Cascade Types Of Viruses •Boot viruses •Program viruses
  • 4. • Multipartite viruses They infect program files and when the infected program is executed, these viruses infect the boot record. When you boot the computer next time the virus from the boot record loads in memory and then starts infecting other program files on disk. Examples: Invader, Flip, Tequila • Macro viruses • Active x virusesIt is a new type of computer virus that infects the macros within a document or template. When you open a word processing or spreadsheet document, the macro virus is activated and it infects the Normal template (Normal.dot)-a general purpose file that stores default document formatting settings. Examples: DMV, Nuclear, Word Concept. ActiveX and Java controls will soon be the scourge of computing. Most people do not know how to control there web browser to enable or disable the various functions like playing sound or video and so, by default, leave a nice big hole in the security by allowing applets free run into there machine.
  • 5. How Do Computer Viruses Spread? Computer viruses usually spread in one of the three ways
  • 6. E-mail Virus.. Removable Disc How To Remove A Computer Virus Install and Update the antivirus software on the computer. Then, perform a thorough scan of the computer by using the antivirus software. Install the latest updates from Microsoft Update on the computer. Download, install, and then run the Malicious Software Removal Tool to remove existing viruses on the computer. To download the Malicious software removal too.
  • 7. How To Scan A Computer For Viruses..!!!
  • 8. How To Protect Your Computer Against Viruses On the computer, turn on the firewall Keep the computer operating system up to date Use updated antivirus software on the computer