In recent years computer viruses have been a problem throughout the world. Many people do not know what viruses are, nor how to get rid of them. The purpose of this paper is mainly to explain how a computer virus can be detected and eliminated. This paper includes a definition of a virus as well as various types of them. Also it describes how a virus can penetrate your computer.
Computer viruses are computer software programs just like spreadsheets and word processors.
They are simply a list of instructions that tell a computer what to do and how to do it. Viruses, therefore, can do all the operations that supported by the host computer's operating systems, just like any other software. Unlike computer software programs like spreadsheets, computer viruses are designed to function in manner diametrically opposed to all legitimate software programs. Viruses perform without the permission of the user and without warning the user of the consequences of their actions. Also, viruses do not print error messages when they encounter an error.