Shiela USB Shield is a powerful first line defense against virus from infected removable drives. It locks autorun.inf and associate executable files in multiple instance Delete/Freeze the shortcut file or clone file, and restores the original automatically. It is free and open source.Features: Absolutely free Open source Lightweight and fast Full first-line protection against virus Automatic file fixing for the files affected by a virus Multiple locking of autorun.inf and its associate executable file USB write protection and USB mass storage control Includes USB vaccination tool Equipped with file and folder unhiding tool