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Virus Alert ::

What is a Virus?

A computer virus is a computer program written to alter the way a computer operates, without the permission or knowledge of the user, by hiding in other program files. Though the term is commonly used to refer to a range of malware, a true virus must do these two things: replicate itself and execute itself.

What is a worm?

Computer Worms are programs that reproduce and run independently, and travel across network connections. The main difference between viruses and worms is the method in which they reproduce and spread. A virus is dependent upon a host file or boot sector, and the transfer of files between machines to spread, while a worm can run completely independently and spread of its own accord through network connections. The security threat of worms is equivalent to that of a virus. Worms are capable of doing a whole range of damage such as destroying essential files in your system, slowing it down to a great extent, or even causing some essential programs to crash. Two famous examples of worms are the MS-Blaster and Sesser worms.

Effect of virus::

Some viruses are programmed to damage the computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and make their presence known by presenting text, video, or audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss.

What is a torjon?

Trojan Horses are impostor files that claim to be something desirable but, in fact, are malicious. Rather than insert code into existing files, a Trojan horse appears to do one thing (install a screen saver, or show a picture inside an e-mail, for example) when in fact it does something entirely different, and potentially malicious, such as erase files. Trojans can also open back doors so that computer hackers can gain access to passwords and other personal information stored on a computer.
Although often referred to as such, Trojan horses are not viruses in the strict sense because they cannot replicate automatically. For a Trojan horse to spread, it must be invited onto a computer by the user opening an email attachment or downloading and running a file from the Internet.

Avoiding Virus Attack

1	Install a good antvirus software. Update your antivirus daily and scan your PC frequently.
2	Update your PC regularly to get security updates and critical software updates.
3	Donot open suspicious e-mail attachment. Before opening it, download it and scan it with antivirus.
4	Donot run any softwares unless you are sure about its origin .
5	Before using any removable drives like pen drive scan it with antivirus. Because your PC may get infected with virus, if removable drive contains virus.
6	Always take a backup of your critical data.
7	If your e-mail software is capable of automatically executing javascript, word macros and other codes, then disable this feature.

Top Virus List

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