CCleaner is a utility designed to speed up your computer by cleaning unneeded files, settings, and Registry entries for Web browsers and many installed applications on your system.
Note: You must be logged in as an administrator to use CCleaner.
Before you run CCleaner:
CCleaner is fine to run with it’s default settings. However, there are a lot of options you can change to preserve certain information. (i.e. Internet History, Saved Passwords, Recycle Bin, etc.)