In the left part of the window, in the Essential Threat Protection section, select File Threat Protection.
The settings of the File Threat Protection component are displayed in the right part of the window.
In the Security level section, click the Settings button.
The File Threat Protection window opens.
In the File Threat Protection window, select the Performance tab.
In the Scan methods section:
If you want the File Threat Protection component to use heuristic analysis, select the Heuristic analysis check box and use the slider to set the heuristic analysis level: Light scan, Medium scan, or Deep scan.
If you do not want the File Threat Protection component to use heuristic analysis, clear the Heuristic analysis check box.