Mention 'noencryption' in the ExtractTemporaryFile topic similar to the Encryption topic.

ishelp/isxfunc.xml

@@ -182,10 +182,11 @@ end;</pre></example>
 <p>The extracted files are automatically deleted when Setup exits.</p>
 <p>An exception will be raised if the file wasn't extracted successfully, if the file wasn't found, or if the file was found but couldn't be processed because of its MinVersion and/or OnlyBelowVersion parameters.</p></description>
         <remarks><p>Use <tt>Flags: dontcopy</tt> in the [Files] section to tell Setup to skip the file during the normal file copying stage.</p>
+<p>Use <tt>Flags: noencryption</tt> in the [Files] section if encryption is enabled and you call the ExtractTemporaryFile function prior to the user entering the correct password.</p>
 <p>When solid compression is enabled, be sure to list your temporary files at (or near) the top of the [Files] section. In order to extract an arbitrary file in a solid-compressed installation, Setup must first decompress all prior files (to a temporary buffer in memory). This can result in a substantial delay if a number of other files are listed above the specified file in the [Files] section.</p></remarks>
         <seealso><p><link topic="isxfunc_ExtractTemporaryFiles">ExtractTemporaryFiles</link></p></seealso>
         <example><pre>[Files]
-Source: "Readme.txt"; Flags: dontcopy
+Source: "Readme.txt"; Flags: dontcopy noencryption
 
 [Code]
 function InitializeSetup: Boolean;