CCleaner is a 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. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware! Key FeaturesCCleaner ProfessionalCleaning for different users: Clean files from all of the user accounts on a computer. This is located in the Options > Users area of CCleaner Professional.Driver Updater: This allows you to quickly and easily update out-of-date hardware drivers on your PC. This helps to improve your computer's speed and stability and to prevent errors and crashes. Driver Updater appears in the CCleaner app's left-side navigation menu next to Custom Clean and other tools.Software Updater: This tells you what programs on your computer need to be up