Clear the Run history on the Start menu!!

1. Vista-
   

   Applies to all editions of Windows Vista

• 1.	Open Taskbar and Start Menu Properties by clicking the Start button , clicking Control Panel, clicking Appearance and Personalization, and then clicking Taskbar and Start Menu.

2-XP-Delete run prompt history on taskbar, right click>Properties>Start Menu>Customize> click on clear , wiat for some time and then press OK to come out.