:/ Oh really now, wanna do me a favor then? In Windows XP, click start>run then type something in and hit enter, then do that a few more times. Then open up ccleaner and(with that box checked, I have all but the last section checked and the latest version) do your cleaning. Then open up your run box and tell me what you see.
And the method I listed, doesn't just clear the recent documents, it also clears the run box.