http://www.emptyloop.com/unlocker/
Unlocker is a tool that can trace and "unlock" the locking protection commonly used in system files. However, its main use is to terminate the processes that are using a certain file, or force the processes to stop using the file, so the user can safely delete, rename or move the file. It is written by the French programmer Cedrick 'Nitch' Collomb and the latest version is 1.9.1.
Unlocker is a GUI application with the feature of command-line interface through an administrative console. It can unload application extensions, terminate processes, as well as force a process to stop using a certain file (This function is called "Unlock" in the program itself). Also a portable variant of the program is available.
