CCleaner Portableis 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. This portable version can run it without any installation.
What's new in this version:
Version 4.03.4151 adds command line option to reboot after cleaning and Cookie management for multiple users.