Both VirusScan and NetShield use McAfee's patented incremental updating technology, AutoUpdate, to keep themselves up-to-the minute on the latest viruses. Checking the McAfee website or an FTP site defined by the administrator on a configurable schedule, AutoUpdate downloads only the changes to the virus definitions database that have occurred since its last update, preventing unnecessary use of network bandwidth. At the end of the day, all the manageability and policy enforcement in the world won't stop a virus, if the anti-virus solution can't detect and clean viruses. All the McAfee Active VirusScan Suite components use the award-winning McAfee virus-scanning engine. With unique double heuristic scanning technology, generic variant detection capabilities, and industry-leading compressed file handling, the McAfee engine is one of the best money can buy.