diff --git a/in/public/systems/windows/index.rst b/in/public/systems/windows/index.rst
index abe990a..7e59785 100644
--- a/in/public/systems/windows/index.rst
+++ b/in/public/systems/windows/index.rst
@@ -12,6 +12,6 @@ Prevent short session lock timeout
 
  set shell = wscript.createobject("wscript.shell")
  do while true
-     shell.sendkeys("{F16}")
+     shell.sendkeys("{NUMLOCK}{NUMLOCK}")
      wscript.sleep(1000*59)
  loop