Patent ID: 6240530
Filing Date: 2001-05-29
Classification: G06F

Abstract:
A method for exterminating a computer virus which infects a computer system and acts as a software destroying factor, the computer system having a processing section for executing an operating system program so as to process various data, a volatile memory section coupled with the processing section for temporarily storing the operating system program to be executed and the object data to be processed by the processing section, and a first non-volatile storage section connected to the processing section for storing various data including the operating system program, comprising;(i) detecting a computer virus which infects the computer system and identifying a type of the detected computer virus;if any computer virus is detected in said operation (i),(ii) outputting a trigger signal which indicates that the computer system starts the virus exterminating operation; and(iii) carrying out the virus exterminating operation in response to the trigger signal outputted in said operation (ii) byclearing the information stored in the volatile memory section,fetching an united operating system program from a second non-volatile storage section, which is separate from the first non-volatile storage section and connected to the processing section and to which storage section the processing section is prohibited to write data and placing the uninfected operating system, into the volatile memory section after the clearance of the information in the volatile memory section and starting up the computer system using the uninfected operating system program, andexterminating the detected computer virus under the uninfected operating system environment.