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compressed to save disk space. Therefore, they are perfect virus hideouts and infection<br />
hubs. Those compressed files are scanned, decompressed and scanned again. Please<br />
note that archives can be quite large sometimes and scanning them for viruses may take a<br />
long time.<br />
• By default the scan of archives is turned On.<br />
• Scan archives<br />
You may turn off the scanning of archives by choosing Do not scan archives.<br />
7.4 Heuristic Detection<br />
<strong>Avira</strong> Mac Security contains a highly powerful heuristic and macro virus heuristic that can<br />
proactively detect unknown malware and new viruses. It enhances the so called signature<br />
based detection which looks for known viruses. Macro viruses are small programs that are<br />
written in the macro language of an application (for example WordBasic under WinWord<br />
6.0) and that can normally spread within documents of this application. For this reason,<br />
they are also called document viruses, you may receive per email. In order to be active,<br />
they need that the corresponding applications are activated and that one of the infected<br />
macros has been executed.<br />
Scan for macro viruses<br />
You may turn off the scan for macro viruses.<br />
Use heuristic detection to find new viruses<br />
You may turn off the heuristic detection to find new viruses.<br />
Heuristic Detection Level<br />
By default, the search with heuristic technique is turned on and the detection level is<br />
set to Medium.<br />
You may change the detection level by moving the slider control.<br />
� Low: Weakest detection level with a low risk that clean files will be detected as<br />
infected.<br />
� Medium: Strong detection level with a low risk that clean files will be detected as<br />
infected.<br />
� High: Strongest detection level with a higher risk that clean files will be detected as<br />
infected.<br />
7.5 Threat Categories<br />
<strong>Avira</strong> Mac Security not only searches for all kinds of viruses but protects your Mac against<br />
various other threats, such as dangerous or unwanted applications. If you are not sure<br />
what kind of threats you want <strong>Avira</strong> Mac Security to scan for, keep the default values.<br />
<strong>Avira</strong> Mac Security - <strong>User</strong> <strong>Manual</strong> (Status: 29. 05. 2012) 41