Kaspersky Internet Security scans files of all formats and extensions.

If you select this option, Kaspersky Internet Security scans only files that can be infected by a virus. Prior to scanning an object for viruses, its internal header is analyzed in order to determine the file format. During the scan, file extensions are also taken into consideration.

In this case, Kaspersky Internet Security scans only files that can be infected by a virus. The file format is determined based on the extension of a file.

Files without extensions are always scanned, regardless of the file type selected in the File types section.

This check box enables / disables the scanning only of new files and those files that have changed since the last time they were scanned. This scan mode applies both to simple and compound files.

This check box enables / disables the time limit for scanning an object. When the specified time interval elapses, file scanning is discontinued, and Kaspersky Internet Security skips the file.

Selecting this check box causes the scan to stop after 30 seconds by default.

This check box enables / disables scanning of RAR, ARJ, ZIP, CAB, LHA, JAR and ICE

The check box enables / disables scanning of installation packages.

This check box enables / disables scanning of

This check box enables / disables the option for Kaspersky Internet Security to scan files in email formats and mail databases.

If this check box is selected, Kaspersky Internet Security parses the email format file and analyzes each component (body, attachments) for viruses.

If this check box is cleared, Kaspersky Internet Security scans the email format file as a single object.

If this check box is selected, Kaspersky Internet Security excludes from scanning compound files larger than the specified limit (except larger files extracted from archives).

If this check box is cleared, Kaspersky Internet Security scans compound files of all sizes.

When performing signature analysis, Kaspersky Internet Security uses databases that contain descriptions of known threats and ways of neutralizing them. Protection using signature analysis provides a minimal acceptable security level.

As recommended by Kaspersky Lab experts, the application always has this analysis method enabled.

This check box enables / disables

The slider allows you to adjust the level of heuristic analysis. The heuristic analysis level sets the balance between the thoroughness of searches for threats, the load on the operating system's resources, and the time required for scanning.

The following heuristic analysis levels are available:

• Light scan. Heuristic analyzer performs fewer operations found inside executable files. The probability of threat detection in this mode is somewhat lower. Scanning is faster and less resource-intensive.
• Medium scan. Heuristic analyzer performs the number of actions found within executable files recommended by the experts of Kaspersky Lab.
• Deep scan. Heuristic analyzer performs more operations found inside executable files. The probability of threat detection in this mode is higher. Scanning consumes more system resources and takes longer.

The slider is available if the Heuristic Analysis check box is selected.

This technology is a development of the iChecker technology for computers using the NTFS file system.

There are limitations to iSwift Technology: it is bound to a specific file's location in the file system and works only with objects in the NTFS file system.

This check box enables / disables the use of iSwift technology.

This technology allows increasing scan speed by excluding certain files from scanning. Files are excluded from the scan using a special algorithm that takes into account the release date of Kaspersky Internet Security databases, the date when the file was scanned last, and any changes made to the scan settings.

There are limitations to iChecker Technology: it does not work with large files and applies only to files with a structure that the application recognizes (for example, EXE, DLL, LNK, TTF, INF, SYS, COM, CHM, ZIP, and RAR).

This check box enables / disables the use of iChecker technology.