Virus
1
By Dhanashree Shinde
What is virus???
Virus is nothing but the part of
program which harms our data badly.
It comes to us through an effected
d...
Types of viruses:
1. Time bomb
2. Logical bomb
3. Boot sector virus
4. Worm
5. Trojan horse
6. Macro virus
3
TIME BOMB
A virus program which performs it’s
task on the particular date...
So called as the time bomb....
4
Logical bomb
It performs it’s task when particular
action has occured.......otherwise it is
not harmful.
The action can be...
Worm ........................
Worm is the program which fills the
computer with self-replicating files ,
which decreases t...
Boot sector virus
This virus effects the boot sector i.e.
Sector 0 of the hard disk
Once this virus enters in your system
...
Macro virus
A macro virus is associated with
application software like word and
excel. When opening the infected
document,...
Script virus
Commonly found script viruses are
written using the Visual Basic
Scripting edition (VBS) and the
JavaScript p...
Trojan horse
Trojan Horse is a destructive
program. It usually pretends as
computer games or application
software. If exec...
Prevention is better than
cure....
The best way to have a virus-free
system is to use the antivirus.
Antivirus is also the...
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Viruses and its type..

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what are viruses and its type.....

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Viruses and its type..

  1. 1. Virus 1 By Dhanashree Shinde
  2. 2. What is virus??? Virus is nothing but the part of program which harms our data badly. It comes to us through an effected device or mostly through internet.... Viruses decrease the performance of the computer. Their existence can harm our hardware part also.... 2
  3. 3. Types of viruses: 1. Time bomb 2. Logical bomb 3. Boot sector virus 4. Worm 5. Trojan horse 6. Macro virus 3
  4. 4. TIME BOMB A virus program which performs it’s task on the particular date... So called as the time bomb.... 4
  5. 5. Logical bomb It performs it’s task when particular action has occured.......otherwise it is not harmful. The action can be clicking on the particular folder... Or anything like that 5
  6. 6. Worm ........................ Worm is the program which fills the computer with self-replicating files , which decreases the speed of the system & sometimes the system crashes. These kind of viruses are detectable & deletable . 6
  7. 7. Boot sector virus This virus effects the boot sector i.e. Sector 0 of the hard disk Once this virus enters in your system then you must have to FORMAT your system. 7
  8. 8. Macro virus A macro virus is associated with application software like word and excel. When opening the infected document, macro virus is loaded into main memory and destroys the data stored in hard disk 8
  9. 9. Script virus Commonly found script viruses are written using the Visual Basic Scripting edition (VBS) and the JavaScript programming languages. 9
  10. 10. Trojan horse Trojan Horse is a destructive program. It usually pretends as computer games or application software. If executed, computer system will be damaged. 10
  11. 11. Prevention is better than cure.... The best way to have a virus-free system is to use the antivirus. Antivirus is also the program which deletes the virus....i.e. It deletes the part of the virus which is malicious. 11

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