VIRUS , WORMS AND TROJAN :- A virus is a program that will run background of the system .Virus can be damage your computer and corrupt your files, hard disk etc.
VIRUS:First of all virus are the Programs that damage the system or put some errors into the system to make it vulnerable for the hacker.
There are different type of virus
1:virus which damage your system.
2:virus which vulnerable your system.
WORMS:A worm is a program or type of virus which replicates itself with other computers that are connected to that computer in which worm are presented.Worms almost cause always some at least to the network (bandwidth)..etc
TROJAN:A trojan is a malware that have to be run in the target computer in order to remotely access to that computer.In order to send the trojan hacker bind that trojan to other software and send it to the client and when the client run that software that trojan will also run in the background.
There the many types of the trojan available in the world of computer.
1:cybergate
2:beast
3:pro horse
How to protect your systems from virus and worms
1:Install a antivirus in your system.
2:Always update your antivirus so that new virus and worms are not be able to attack on your system.
3:Install a firewall on your system if you not want to install firewall on your system you can use windows firewall that is default firewall.
4:When you download any software from the torrent or any other site please scan that software with your antivirus.
5: Try to avoid the links which are malicious and download itself when opened.
6:Check your application that are run in the background of your system in order to detect the trojan and virus .

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