The Engines and performance setting (in Antimalware - Realtime and Antimalware - Scheduled) and the Scan engines and performance setting (in Task Library - On-Demand Scan) control how many of the selected engines should be used in order to provide you with an acceptable probability that your system is protected. There is a trade-off between increasing the probability of catching a virus and maximizing your system performance. The more engines you use, the greater the probability that all viruses will be caught. However, the more engines you use, the greater the impact on your system's performance.

These settings only apply to virus scanning. They are not used in filtering or spyware scanning. You must select the policy for each scan (realtime, scheduled, and on-demand) that you configure; it is not global.

To configure the number of scan engines, select from the following Engines and Performance options:

Click Save after making any changes to your settings.

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