What is Unlocker?
Get rid of error message like Error deleting or renaming file or folder, cannot delete folder: its being used by another person or program Unlocker application was designed to be a very useful Windows Explorer extension allowing users with a simple right-click on a file or folder to easily get rid of error message such as error deleting file or folder, cannot delete or rename folders. 17 languages.
The program is no longer updated. Last version, 1.9.2, released in May 2013, can be still downloaded from the official website.
Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/