WHAT IS A COMPUTER VIRUS

computer viruses

computer virus is a potential damagng computer program capable of reproducng itslf

and causng grt harm to progrm and other filess without prmisson of knwldge of the user...........



Computer Virus and its types
A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The term "virus" is also commonly used, albeit erroneously, to refer to many different types of malware and adware programs. The original virus may modify the copies, or the copies may modify themselves, as occurs in a metamorphic virus.

A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or the Internet, or by carrying it on a removable medium such as a floppy disk, CD, or USB drive.

Meanwhile viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer.

What They Infect

Viruses can infect several files of the computer's operating and file system. These include:

* System Sectors
* Files
* Macros
* Companion Files
* Disk Clusters
* Batch Files
* Source Code