Introduction to Computer Virus

[jibesh]

In general, a virus is a program (parasite) that infects another program (host). To infect the host program, the virus makes copies of itself that may harm the host program.
A computer virus is a computer program that can copy itself and infect a computer's hardware and software components. The term "virus" is also commonly but erroneously used to refer to other types of malware, adaware and spyware programs that do not have the reproductive ability.
A virus might corrupt or delete data on a computer, use the email programs to spread itself to other computer, or even erase everything on the hard disk. Viruses are often spread by attachments on email messages or instant messaging messages. That is why it is essential that we never open email attachments unless we know who it's from and we are expecting it.

[sahaj]

A computer virus is a computer program that can replicate itself and spread from one computer to another.The term "virus" is also commonly, but erroneously, used to refer to other types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability.Viruses disfunctions the system of a computer.some virus delets the data.some viruses makes the drives full, and some virus arries like a carftoon type.It is better to use antivirus before the virus infected

[Rajiv Rai]

Computer virus is a program which makes computer slow and effect all the hardware and software.It enables to do work .We can not give 100% guarantee that computer don't have virus .It exist in any corner of computer.Virus should be avoided to make computer fast with the help of antivirus.

[mightyfun]

Computer virus is a program that infects other files of our computer. It might be very dangerous some are less dangerous as well. We need to protect from these viruses by installing anti virus. The information of yours is very helpful to know lot about virus.

[nahial]

A computer virus is a special kind of computer program which:
Spreads across disks and networks by making copies of itself, usually surreptitiously.
Can produce undesired side-effects in computers in which it is active.
In order to infect a computer, a virus has to have the chance to execute its code.
Viruses usually ensure that this happens by behaving like a parasite, i.e. by modifying another item so that the virus code is executed when the legitimate item is run or opened.

[RadhaKrishna]

computer virus are the programme againist the software and hardware in a computer and other electronic applications. They seriously effects the functioning systems and brings lot many problems in software and hardware. This are controlled by installing Antivirus softwares and doing regular scannings.

[sudhir.bthi]

Computer Virus is a software or a programs itself. Computer virus is a series of source code, Computer virus is also used for protection not only for destruction. But nothing more it is also the programs as other computer programs.