Computer Virus

Subject: Computer

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Computer virus is a type of destructive program that can replace itself by making copies of itself without the knowledge of user.
A computer virus can destroy data, files or programs and cause the system malfunction.
Macro viruses are commands which are designed to infect a specific type of document file such as MS-Word or MS-excel support.
Boot sector virus infects the information system during the start-up process.
File infector virus infect application programs.
Polymorphic virus is self- encrypted virus which avoid detection of the scanner.
Multiparties virus is the combination of boot sector virus and program virus.