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With the wide use of computer in every field of social life, the virus attack and its prevention technology is continuously developed as well. It is reported that there have been hundreds of millions of computer virus infection and attacking incidents in the countries all over the world, which seriously disturb the normal social life of human being and bring enormous potential threat and damage to computer nets and systems. The article makes brief introduction to the charateristics and the forms of expression of computer virus, and discusses the prevention technology and inspection methods of computer virus.

Key word: computer, virus, prevention

as computers have entered every corner of our social life, so is technology of computer viruses' invasion and defence. thousands of millions of computers are reported victims of computer viruses annually in the world, which disorders the normal life and poises as a potential threat and destroy and destructive force to n