What is Computer Virus?

A computer virus is an executable program created by “mean" people. Depend on the nature of a virus, it may cause damage of your hard disk contents, and interfere normal operation of your computer. These viruses are take place into programs so that programs will run with these particular viruses when it is boots. So these viruses are infected the executable file or program. Viruses work the same ways in all Windows.

Virus will active until your infected program or application is executed. Once a virus is active, it loads into your computer's memory and may save itself to your hard drive or copies itself to applications or system files on disks you use. Some viruses are programmed specifically to damage the data on your computer by corrupting programs, deleting files, or even erasing your entire hard drive.

Many viruses do nothing more than display a message or make sounds , verbal comments at a certain time or a programming event after replicating themselves to be picked up by other users one way or another. Other viruses make your computer's system behave erratically or crash frequently. Sadly many people who have problems or frequent crashes using their computers do not realize that they have a virus and live with the inconveniences.

They are designed to spread from one computer to another and to interfere with computer operation. Computer viruses are often spread by attachments in e-mail messages or instant messaging messages. That is why it is essential that you never open e-mail attachments unless you know who it's from and you are expecting it.

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