 CCleaner Released: 00th Jun (a few seconds ago) CCleaner Released: 00th Jun (a few seconds ago) CCleaner Released: 00th Jun (a few seconds ago). May 00, · CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system, allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history/0(00). 