--- a/windows.rst	Wed Dec 14 13:00:01 2011 +0200
+++ b/windows.rst	Wed Dec 14 13:01:12 2011 +0200
@@ -81,9 +81,15 @@
 
   http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/net_use.mspx
 
-Activate windows.
+Activate Windows.
 =================
 
+Activate Windows from command line::
+
+  cmd> slmgr -ipk YGR45-THIS9-WONT5–0WORK-D7667
+
+See:
+
   http://www.microsoft.com/genuine/selfhelp/XPPkuinst.aspx?sGuid=bab9e103-6365-44dd-9337-93f0cd9dd4b7&displaylang=en
                 Windows Product Key Update Tool Instructions