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CCleaner®

CCleaner is the number-one tool for cleaning your PC.
It protects your privacy and makes your computer faster and more secure!

Download Free Version Get CCleaner Pro!

Are you a business user? Click here

New! Easy Clean Mode
What’s that?

New PC Health Check

CCleaner's new Health Check analyzes your PC and recommends quick fixes, then automatically tunes and updates it so it starts and runs faster, and is more secure.

  • Registry repair and Cleaning

    What Is a Registry Cleaner?

    If you own a Windows PC, you'll be used to performing some basic maintenance tasks to keep it running smoothly and prevent problems with applications or files. Most of us regularly update our virus definitions, empty the Recycle Bin and so on.

    When it comes to PC maintenance, a Registry Cleaner should also be part of your toolkit. Its purpose is to keep your Windows Registry tidy, efficient and help applications to run without a hitch.

    But What's the Registry?

    Think of the Registry as a database. On every Windows PC, the Registry stores preferences and settings for applications and the Windows operating system itself.

    Windows does a good job of keeping the registry up-to-date, but doesn't tidy up after itself very well. Over time, as you install and uninstall applications, the registry can become littered with old entries. These can cause error messages and slow the computer down. If you want to ensure that your PC functions correctly, and remains fast, you'll need to clean it up.

    Malware

    Malicious applications (malware) can also cause Registry problems. Even when the software has been removed, the remnants of that application may remain - causing error messages and slowdowns. Cleaning the Registry can help to remove all this left over data.

    Identity Theft

    Many applications save data in the Registry, this may include personal information, such as your email address or passwords. After removing the application, some of this data may remain - creating a security risk! Cleaning the Registry will remove this left over personal data and help prevent data theft should someone get access to your computer.

    Can I edit the Registry myself?

    Technically, you can edit the Windows Registry 'by hand'. But there are two key reasons not to:

    - It's really easy to change the wrong setting

    - If you make a mistake, the consequences might be quite severe. (For example, your PC might refuse to start)

    That's why Registry Cleaners exist - To do the job for you!

    Benefits of Registry Cleaner Software

    Once your Registry has been cleaned up, you will likely notice a performance boost and any error messages you saw whilst using your computer previously will be gone.

    Registry Cleaner will remove entries for non-existent applications, and it'll also fix invalid or corrupted entries i.e. it will repair your registry. You'll probably find your computer starts much more quickly too!

    How do I fix registry errors?

    The great news is that CCleaner contains one of the most used and respected Registry Cleaners on the market today. We encourage you to download and try it out, we know you'll like the results!

  • CCleaner Updates All Your Software NEW

    Outdated apps are a security risk. Old software can have vulnerabilities, which are quickly discovered and shared amongst cyber criminals. CCleaner updates your software automatically to close security holes before they can be found.

  • Award-winning PC Optimization

    Trusted by millions and critically acclaimed, there’s a reason why CCleaner is the world’s favorite PC optimization tool! Easy to use, one click cleaning so beginners can optimize their computers in seconds. Plus, it's packed with advanced features for power users.

  • Faster Computer

    Is your computer running slow? As it gets older it collects unused files and settings which take up hard drive space making it slower and slower. CCleaner cleans up these files and makes it faster instantly.

  • Safer Browsing

    Advertisers and websites track your behavior online with cookies that stay on your computer. CCleaner erases your browser search history and cookies so any internet browsing you do stays confidential and your identity remains anonymous.

  • Fewer Errors & Crashes

    Over time your registry can become cluttered with errors and broken settings which lead to crashes. CCleaner’s patented registry cleaner clears out this clutter to make your PC more stable.

  • Quicker Startup

    Many programs run silently in the background when you start up your computer. CCleaner helps you get to work, or play faster by letting you disable unneeded programs.

Which CCleaner version is right for you?

CCleaner

FREE

 

  • Faster Computer
  • Privacy Protection

CCleaner

PROFESSIONAL BUNDLE
Up to 3 PCs

best value

  • NEW: Software Updater
  • Faster Computer
  • Privacy Protection
  • Real-time Monitoring
  • Scheduled Cleaning
  • Automatic Updates
  • Premium Support

Why Upgrade to CCleaner Professional?

CCleaner Professional is the most powerful version of Piriform's celebrated PC cleaner. It makes it easy to speed up a slow computer and keep your activity private — automatically and in the background.

These are some of the features you get with CCleaner Professional:

Automatic Cleaning

Regularly cleans junk files to keep your computer running smoothly

Automatic Privacy Protection

Clears history and cookies when you're not using your web browser

Automatic Updates

Windows and browsers constantly evolve. CCleaner updates once a month to stay on top!

As featured in

  • BBC
  • The Telegraph
  • The Guardian
  • The Sunday Times
  • The Observer
  • The New York Times
  • The Huffington Post
  • The Washington Post

Also available for your Android device!

CCleaner for Android

CCleaner optimizes your Android in seconds. Making your device cleaner, safer and faster

Free Download
Android Interface

The world's most popular PC cleaner

…protects your privacy and makes your computer faster and more secure

Find out how CCleaner can optimize business computers

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