Selecting a security level

Each virus scan task scans objects on one of these levels:
High - the most complete scan of the entire computer or individual disks, folders, or files. We recommend using this level if you suspect that a virus has infected your computer.
Recommended รป Scans the same items as High except for e-mail formatted files.
Low - Scans less files and therefore, lets you comfortably use applications that require significant system resources.
By default, the file protection is set to Recommended.
You can raise or lower the scan security level by selected the level you want or changing the settings for the current level.
In order to change the security level,

Adjust the sliders. By adjusting the security level, you define the ratio of scan speed and the total number of files scanned: the fewer files are subject to analysis for viruses, the higher the scan speed.

If none of the file security levels listed meet your needs, you can customize the protection settings. To do so, create a User Defined level by selecting the level that is closest to what you need as a starting point and edit its settings.
To modify the settings for the current security level,

click the Settings button in the task settings window. Edit the file scan settings in the window that opens and click OK.

As a result, a fourth security level will be created, User, which contains the protection settings that you assigned.

Also see:
Defining the types of objects to be scanned
Other virus scan settings
Restoring default scan settings