Computer virus trap

(57) Summary computer virus trapping equipment (10) detects and removes this virus, before computer virus advances to computer systems and makes a file, peripheral equipment, etc. Spoilt. This trapping equipment (10) creates the virtual world which simulates the host computer system (28) which a virus tends to infect. This environment is formed as fraternally as possible, and it is made to consider as if it was in the host (28) who is a system which deceives a virus and is made into the purpose. In this virtual world, a virus is encouraged and performs that intended activity. The present invention can detect any destructive actions which occur within the host computer system of this camouflage. The present invention can still take the arbitrary actions which take out this virus from a data stream and are ordered by (52) and the user (38) before, before a virus is conveyed by the host (28).