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
Their existence can harm our
hardware part also....
A virus program which performs it’s
task on the particular date...
So called as the time bomb....
It performs it’s task when particular
action has occured.......otherwise it is
The action can be clicking on the
Or anything like that
Worm is the program which fills the
computer with self-replicating files ,
which decreases the speed of the
system & sometimes the system
These kind of viruses are detectable
& deletable .
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
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
Commonly found script viruses are
written using the Visual Basic
Scripting edition (VBS) and the
Trojan Horse is a destructive
program. It usually pretends as
computer games or application
software. If executed, computer
system will be damaged.
Prevention is better than
The best way to have a virus-free
system is to use the antivirus.
Antivirus is also the program which
the virus....i.e. It deletes the part of
the virus which is malicious.