We generally do not test new definition files with engines over 2 years old,' Leech said. 'Version 4.0.02 is a more than 2-year-old version of our engine. 'Updates of the scan engine are free,' said Leech. On desktop computers the user can start Windows in Safe Mode and disable VirusScan.Īfter getting access to the system, the scan engine will have to be updated manually. On servers running Microsoft Corp.'s Windows NT, the administrator can stop the antivirus service remotely from another machine using the server manager, or by using a tool from the resource kit to remotely kill the service, Leech said. When the computer is restarted, the incompatibility causes the system to freeze.