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.
What's new in this version:
Version 3.18.1707 includes support for Google Chrome 20.0 beta, multi-select to detailed results view, and improved support for Internet Explorer 64-bit Add-ons.