In today’s information age, the pool of information available continues to expand logarithmically. Digital information has transformed the way we create, transmit, store, process and manipulate information. All the electronic resources and information are being stored in computer systems for their retrieval and dissemination. In recent years the detection of computer viruses has become commonplace. It appears that for the most part, these viruses have been ‘benign’ or only mildly destructive. However, whether or not computer viruses have the potential to cause major and prolonged disruptions of computing environments is an open question.