In information system of Computer Networks, there are many computer viruses can do fatal damage to some individual computer systems; the ability to damage is basically decided by their mechanisms of regenerating, not decided by the longer computer virusespsila program or the shorter ones. Today, many of mechanisms and much of computer virusespsila ability to damage that, quite an initial knowledge of peoplepsilas for new computer viruses are still to take much time to research and solve. So all anti-viruses software already existed are too difficult to kill a variety of computer viruses. This paper will introduce a new practice technique of preventing a variety of computer virusespsila creeping in networks based on AI-Properties of VCR (Variable Carrying Rules). It is also called technique of that, while in Rome, do as the Romans do; or technique of interrogating & kidnapping.