--- a/windows.rst	Tue Feb 16 15:27:10 2010 +0200
+++ b/windows.rst	Thu Feb 25 10:31:48 2010 +0200
@@ -85,3 +85,20 @@
 Create the following DWORD value (if it doesn't exist): LmCompatibilityLevel
 
 And set its value to: 1
+
+* CMD.
+
+** How run cmd on 64-bit OS.
+
+From 64-bit process:
+
+  %windir%\System32\cmd.exe (for 64-bit)
+  %windir%\SysWOW64\cmd.exe (for 32-bit)
+
+From 32-bit process:
+
+  %windir%\System32\cmd.exe (for 32-bit)
+  %windir%\Sysnative\cmd.exe (for 64-bit)
+
+  http://msdn.microsoft.com/en-us/library/aa384187%28VS.85%29.aspx
+                File System Redirector