CCleaner for Windows has many functions, but it can't do everything.
10 ways you can use CCleaner for Windows:
Protect your web browsing privacy:
Delete passwords and other temporary internet files so that nobody can see where you've been. CCleaner Professional can also delete browsing data every time you close your internet browser, either automatically or on demand.
Protect your privacy for supported Windows applications:
Remove information about your activity when you use certain apps, such as the files and folders you choose to access. This is for Windows or third-party apps that are supported by CCleaner.
Remove traces of deleted files to aid your cybersecurity:
Skilled criminals can recover deleted files, whether sensitive data or photos. CCleaner can securely delete traces of files to stop this from becoming a risk. This feature also makes it easier to clean out a hard drive you plan to sell on or dispose of.
Save hard drive space and speed up your computer:
Boost your Windows startup procedure by selecting which apps start with Windows. Removing some auto-starting apps can help to optimize your computer’s performance. Removing junk files from your system or web browser can also increase the performance of both hard disk drives (HDDs) or solid-state drives (SSDs) due to the extra free space.
Automatically clean junk files from your PC (Smarting Cleaning):
You can set up CCleaner for Windows to clean junk files from your operating system and web browsers automatically, based on a file size threshold of your choice. CCleaner Free and CCleaner Professional can prompt you to clean files automatically with a notification (or without a notification).
CCleaner Free: this can only clean junk files from your operating system.
CCleaner Professional: this can clean junk files from your operating system and web browsers.
Uninstall apps and software to save hard drive space:
You can uninstall programs directly from the CCleaner app. You can also rename or even delete the add/remove entries from programs that are still installed on your computer.
Get online advertisers and websites off your back:
Cookies can be useful to you, but they can also track your online activity and even increase the prices on things like airline tickets. CCleaner can help delete them if you want to.
Remove duplicate files to save hard drive space:
Use CCleaner’s Duplicate File tool to find and remove copies of photos, downloaded files, and more that are taking up unnecessary space on your hard drive.
Update software to help your security (CCleaner Professional only):
Updating installed software can help your security. It also means that you get the latest features available for apps on your PC that are supported by CCleaner.
Stabilize Windows by cleaning the Windows Registry:
Cleaning the Windows Registry can help stabilize Windows and fix inconsistencies in its performance.
7 ways that you can't use CCleaner for Windows:
CCleaner can't detect or remove malware or spyware:
CCleaner can’t be used on networked drives or NAS storage devices:
The commands that CCleaner sends to the operating system to perform its functions can't be sent over network protocols, so it can only work on drives connected via IDE, SATA, eSATA, or USB to the computer CCleaner’s running on.
CCleaner can't defragment your hard drive:
That’s why we created a free program called Defraggler that can do exactly that.
CCleaner can't recover deleted or corrupted files:
Our other great free product, Recuva, can!
Repair a version of Windows or programs that aren’t working properly:
The tools already built into Windows are better for this.
Speed up your computer (at all times):
Running CCleaner on your current computer does not guarantee it will speed it up, particularly if hardware limitations drive its current performance. However, our product has been tested and proven to work, so it’s always worth trying it out!
Update all the software on your computer (CCleaner Professional):
CCleaner’s Software Updater can update the specific apps and software that our product team has programmed it to update. Sometimes this changes when a newer version of CCleaner is released, and we communicate this in our Release Announcements.