Computer memory and is a program that can spread from one computer to another computer through computer communications systems, for example, through data sheet (Diskette) fraetdaira or network information, which the computer virus hit play, it has been corrupted. The information contained on the disk or the hard disk, or unwanted behavior, such as deleting files that are stored on the hard disk or reformat the hard disk, etc. However, the work of most viruses generally do not focus on the destruction, but it is a simple operation such as threatened, or to display a message to cause fear. It works only in the system's memory only. When using a computer, the next time the virus will work, and it will continue to spread to other programs with the program itself.
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