CCleaner is a free system optimisation tool. With CCleaner your PC will be faster because it analyses selected areas of your computer and gets rid of unusable and useless files. CCleaner knows various applications from the browser to image editing, knows where to find unnecessary files and deletes them. When deleting cookies the CCleaner is clever enough not to delete login data, for example for your email account.
The CCleaner is very careful so that you don't have to except involuntary data loss. Important system files are never touched and before the freeware deletes something it shows you all affected areas.
But the CCleaner can do more. In the 'extras' you can deinstall software and clean up the autostart menu. If you're sure enough, you can also delete old recovery points here to free up even more capacity. You can also delete the content of whole hard disks with the 'Hard Disk Wiper'.
The "Registry Cleaner" searches data for old and faulty entries. Before it cleans them CCleaner offers to create a backup. If something doesn't work as it used to afterwards, it can be recovered within seconds.
In the settings you can set up customised folders, which are being cleaned up at every start. The free PC cleaner offers more settings such as the automatic clean-up during the boot process.
Version 4.0x also offers news graphics and icons, has an improved performance according to the manufacturer and works better on the 64 bit systems of Windows 7 and 8. The paid-for Pro version includes browser- and system monitoring tools. The newest update even works with Windows 8.1 preview. All other changes can be found in the official changelog.
Verdict: High end data deletion. The little tool for the hard disk cleans your system from all unnecessary ballast. If you use your computer a lot, CCleaner will often find several GByte of temporary files and other rubbish. With the free CCEnhancer you can even increase the functionality of the popular cleaning tool CCleaner.
Tip: The standard version of the CCleaner includes advertising during the installation. Some anti-virus programs can mark this adware as potentially dangerous and block it if your settings are very strict. Therefore we recommend to download the mobile CCleaner version.