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<title>Enable on-access scanning inside archives and compressed files</title>
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	<h1 class="topictitle1">Enable on-access scanning inside archives and compressed files</h1>

<div><div class="section" id="task_CA7021B2BBA94F75BBF504CEC8ACE717__context_9E37EDE85D564279A4BF251FFD4D9793"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__context_9E37EDE85D564279A4BF251FFD4D9793"><!-- --></a> 
		  <p id="task_CA7021B2BBA94F75BBF504CEC8ACE717__paragraph_2"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__paragraph_2"><!-- --></a>By default, on-access scanning inside archives and compressed files is disabled. However, you might want to enable the option if you are dealing with several such files at a time and the cost of not detecting a threat is high. For example, you might be emailing some archives or compressed files to an important contact.</p>
<div class="note"><span class="notetitle">Note:</span>  Sophos recommends
			 that you do not enable this option, for the following reasons:<a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__ul_224DD017579E489D99C648F04A7DDA60"><!-- --></a><ul id="task_CA7021B2BBA94F75BBF504CEC8ACE717__ul_224DD017579E489D99C648F04A7DDA60"><li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_CD007FD1BBE643BD946AF8B9AD9A280B"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_CD007FD1BBE643BD946AF8B9AD9A280B"><!-- --></a>Scanning inside archives and compressed files makes
			 scanning significantly slower.</li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_BB56233CBC394200B6D7AEAD574A037B"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_BB56233CBC394200B6D7AEAD574A037B"><!-- --></a>Whether you
			 enable this option or not, when you open a file extracted from an archive, the extracted file is scanned.</li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_914F6A9CAEE745CA8A477C4BB79B7254"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__li_914F6A9CAEE745CA8A477C4BB79B7254"><!-- --></a>Whether you
			 enable this option or not, files compressed with dynamic
		  compression utilities (PKLite, LZEXE and Diet) are scanned. 
		</li>
</ul>
</div>
 <p> To enable on-access scanning inside archives and compressed files:</p>
</div>
<a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__steps_FA0EBD0751424B10853BA1CA47F932DD"><!-- --></a><ol id="task_CA7021B2BBA94F75BBF504CEC8ACE717__steps_FA0EBD0751424B10853BA1CA47F932DD">
			<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_cf_1215800069207113"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_cf_1215800069207113"><!-- --></a><span>Choose <span class="menucascade">
      <span class="uicontrol">Sophos Anti-Virus</span>
       &gt; <span class="uicontrol">Preferences</span>
     </span>.</span></li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_3C29A20C893243F78B4EA6E4BA5DA70C"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_3C29A20C893243F78B4EA6E4BA5DA70C"><!-- --></a><span>Click <span class="uicontrol">On-access Scanning</span>.</span></li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_F4364B69469C48B19F8AE08D893FDD05"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_F4364B69469C48B19F8AE08D893FDD05"><!-- --></a><span>If some settings are dimmed, click the lock icon and type an administrator name and password.</span></li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_1D391FE9554C4556BB208DE9FB48F084"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_1D391FE9554C4556BB208DE9FB48F084"><!-- --></a><span>Click <span class="uicontrol">Options</span>.</span></li>
<li id="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_B4C7C2818669471C91C11B6B2964681C"><a name="task_CA7021B2BBA94F75BBF504CEC8ACE717__step_B4C7C2818669471C91C11B6B2964681C"><!-- --></a><span>Select “<span class="uicontrol">Inside archives and compressed files</span>”.</span>
			</li>

		</ol>

	</div>

<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="../concepts/Configuring_on-access_scanning.html" title="">Configuring on-access scanning</a></div>
</div>
</div>

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