It would be nice to have the option to perform cleaning tasks at the time of Shutdown and/or Restart, rather than only on bootup. I've always perferred to clean everything up when exiting Windows, so all files that are loaded/read by Windows and/or certain programs are fresh upon Window's startup. Unnessary files aren't there to be read or initalized as well at bootup if everything is cleaned up when the last session was closed. This conept is also beneficial at times when a program runs before Windows GUI starts, such as defragging MFT, virus scanning, etc.
Gotta' love CCleaner!
