Cleaner is a Security software developed by Piriform Ltd. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Cleaner:
EditByBrothersoft: It is known, that after deleting files in Windows, they can be Restored, since the information on the disk is not deleted, and is marked as free blocks. CleanerSecurely deletes file data, located in free disk space. After that the restoring of the information becomes impossible. you can free download Cleaner 1.1 now.