Comment 29 for bug 434476

Some docs on Windows:

* Why does Windows wait longer than my screen saver idle timeout before starting the screen saver?
http://blogs.msdn.com/b/oldnewthing/archive/2009/08/20/9876113.aspx

* Block screensaver/standby/energy management
http://social.msdn.microsoft.com/forums/en-US/Vsexpressvcs/thread/80704e31-ea1e-4d5f-bab2-3ba4d910b363

NB: If password protection is enabled by policy, the screen saver is started regardless of what an application does with the SC_SCREENSAVE notification—even if fails to pass it to DefWindowProc.