MRU-Blaster is a program made to do one large task - detect and clean MRU (most recently used) lists on your computer.
These MRU lists contain information such as the names and/or locations of the last files you have accessed. They are located ALL OVER your registry, and for almost ANY file type. By looking at these MRU lists, someone could determine what files you opened/saved/looked at, what their file names were, and much more! (And, in many cases, the lists are displayed in drop-down menus automatically.)
Info:
http://www.javacoolsoftware.com/mrublaster.html
Download:
http://www.javacoolsoftware.com/mrudownload.html