Quick Start is a freeware Windows application that runs in the system tray which allows you to search Start Menu, Favorites, Recent Files, Desktop, Browser History as well as custom file extensions and folders. Features include:

-Launch applications, url’s, etc, by simply typing a keyword
-Automatically load keywords from the Start Menu, Favorites, etc
-Smart sort function that list recently used applications first
-Support for Firefox bookmarks
-Launch Windows explorer by typing a directory or network path

Download here