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During the past six years, computer viruses have caused unaccountable amount of damage - mostly due to loss of time and resources. For most users, the term 'computer virus' is a synonym of the worst nightmares that can happen on their system. Yet some well-known researchers keep insisting that it is possible to use the replication mechanism of the viral programs for some useful and beneficial purposes. This paper is an attempt to summarize why …

…to trigger the monitoring programs. However, the modification that it causes to the hard disk when infecting it, will trigger most integrity checkers. Those that have the capability to automatically restore the boot sector, thus removing any possibly present virus, will cause the encrypted disk to become inaccessible and therefore cause serious damage. Third, the idea violates the Compatibility condition. A boot sector virus that is permanently resident in memory usually causes problems to Windows