Index: /trunk/doc/manual/en_US/user_Introduction.xml
===================================================================
--- /trunk/doc/manual/en_US/user_Introduction.xml	(revision 71809)
+++ /trunk/doc/manual/en_US/user_Introduction.xml	(revision 71810)
@@ -543,4 +543,11 @@
     role="bold">experimental</emphasis> is not supported. Feedback and
     suggestions about such features are welcome.</para>
+  </sect1>
+
+  <sect1 id="hostcpurequirements">
+    <title>Host CPU Requirements</title>
+
+    <para>SSE2 is required starting with VirtualBox version 5.2.10 and version 5.1.24.</para>
+
   </sect1>