Enabling advanced heuristic scanning in Symantec Protection Engine
Advanced Heuristics applies a detection method that is more aggressive than the standard detection and hence leads to better protection. On enabling this feature, there may be a slight decrease in performance and a slight increase in false positives. It is recommended to enable this feature when there is a suspected infection outbreak in the network. You can disable this feature after the outbreak has been resolved and is under control.
To enable advanced heuristic scanning in Symantec Protection Engine
In the console on the primary navigation bar, click Policies.
In the sidebar under Views, click Scanning.
In the content area under Advanced Heuristics, check Enable advanced heuristic scanning.
Click OK on the Advanced Heuristics message pop-up box.
On the toolbar, select one of the following options:
Saves your changes.
Use this option to continue making changes in the console until you are ready to apply them.
Applies your changes.
Your changes are not implemented until you apply them.