--- a/windows.rst	Sat Nov 13 23:03:07 2010 +0200
+++ b/windows.rst	Sun Nov 14 10:51:53 2010 +0200
@@ -335,3 +335,13 @@
 and select one on them:
 
   $ cmd /c assoc .mp3=AIMP.mp3
+
+* Clean up Windows system directories.
+
+You can safely remove SP restore files:
+
+  %Systemroot%\$NtServicePackUninstall$
+
+  http://support.microsoft.com/kb/290402
+                HOW TO: Remove the Service Pack Restore Files and Folders in Windows
+