Soft191 Shredder provides a fast way to securely delete files and erase free disk space. Data is overwritten (1 to 10 times) prior to files being deleted. The program resides in the system tray, and includes a 'drop zone' which is a small icon that can be moved around the screen and to which you can drag drop files/folders for shredding/deleting. The drop zone can be turned on or off.