CCleaner is a freeware system optimization, privacy and cleaning 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. Additionally it contains a fully featured registry cleaner.

CCleaner Network Professional combines all the functionality of the PC optimization tool CCleaner plus the disk performance enhancement benefits of Defraggler delivered for network administrators in a single, simple, fast interface. Optimize entire network from single computer; Manage single or multiple computers at once; Active Directory support; Highly secure client and encrypted communications; Support for small and large networks.