Sandboxie doesn't properly implement the 'forced folders' rule if the GUI is closed. If the GUI is shutdown, Sandboxie does not sandbox the dialogue box - which pop-ups on insertion of removable disks, and the window in which the removable disk's contents are opened isn't sandboxed either. Only the files executed from the removable disk are sandboxed. If the GUI is running - upon the insertion of external disks - without letting the dialogue box open, Sandboxie opens the contents in a sandboxed window. Forced removable-folders (CDs/DVDs and USBs) seems to work differently when the GUI is running from when it is not.