+.PP
+wimlib v1.6.0 and later can mount version 3584 WIMs, which usually use packed,
+LZMS-compressed streams and may carry the \fI.esd\fR file extension rather than
+\fI.wim\fR. However, such files are not designed for random access, so reading
+data from them when mounted may be very slow. In addition, \fI.esd\fR files
+downloaded directly by the Windows 8 web downloader have encrypted segments, and
+wimlib cannot mount such files until they are first decrypted.