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Virus

By Dhanashree Shinde

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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....

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Types of viruses:

1. Time bomb2. Logical bomb3. Boot sector virus4. Worm5. Trojan horse6. Macro virus

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TIME BOMB

A virus program which performs it’s task on the particular date...So called as the time bomb....

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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

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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 .

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Boot sector virus

This virus effects the boot sector i.e. Sector 0 of the hard diskOnce this virus enters in your system then you must have to FORMAT your system.

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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

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Script virus

Commonly found script viruses are written using the Visual Basic Scripting edition (VBS) and the JavaScript programming languages.

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Trojan horse

Trojan Horse is a destructive program. It usually pretends as computer games or application software. If executed, computer system will be damaged.

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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 deletesthe virus....i.e. It deletes the part of the virus which is malicious.