What Does Orphan File Mean?
An orphan file is a file that has been left over after its parent application has been removed or uninstalled from the system. Orphan files may include files with a .dll extension.
The most common reason for the presence of an orphan file is incomplete uninstallation of its parent application, usually the result of manually deleting the application. Hard drive cleanup utilities will often manage orphan files as they scan for temporary files.