To protect the computer's file system, the File Threat Protection component applies various groups of settings. These groups of settings are called security levels. There are three preset security levels: High, Recommended, and Low. The Recommended security level settings are considered to be the optimal settings recommended by Kaspersky experts. You can select one of the preset security levels or manually configure security level settings. If you change the security level settings, you can always revert back to the recommended security level settings.
To change a security level:
After you configure a custom security level, the name of the security level in the Security level section changes to Custom.