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Using heuristic analysisObjects are scanned using databases containing descriptions of all known malware, and the corresponding disinfection methods. Kaspersky Internet Security compares each scanned object with the database's records to determine firmly if the object is malicious, and if so, into which class of malware it falls. This approach is called signature analysis and is always used by default. Since new malware objects appear daily, there are always some malware which are not described in the databases, and which can only be detected using a heuristic analysis. This method presumes the analysis of the actions an object performs within the system. If such activity is typical of malicious objects, the object is likely to be labeled as malicious or potentially infected. As a result, new threats will be identified before they become known to virus analysts. Additionally you can set the detail level for scans. It sets the balance between the thoroughness of searches for new threats, the load on the operating system's resources and the time required for scanning. The higher the detail level, the more resources the scan will require, and the longer it will take. In order to use the heuristic analysis and to set the detail level for scans:
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