The /AUTO option is nice so you don't have to open the cleaner & then run the cleaner. But when cleaner is run from a Windows shortcut, there is no real way to tell when cleaner has finished. If cleaner executed in the foreground under /AUTO - not as a background process - it could be run in a minimized window that would appear only while cleaner was still active. Then the user could see that it is safe to use apps/directories/etc that might conflict with an active cleaner process.