Hackers took the legitimate program and inserted malicious code that was designed to steal data from users.

However, in September 2017, CCleaner malware was discovered. In January 2017, CNET gave the program a 'Very Good' rating. During the cleanup, malicious files buried in the system are also deleted. The software gets rid of temporary files that eat up disk space and invalid Windows registry keys. Please see Why am I being asked to renew CCleaner? for more information and how to resolve this.CCleaner is a utility program designed to delete unwanted files from a computer.

However, you can still use CCleaner as a free version. This means the time period in which your license was valid has ended, so you are no longer eligible to use CCleaner Professional features in CCleaner. If your license status is ‘License Expired’ or you're asked to renew your license

If this is the case, please contact us at so we can help you. Or, you may have also unknowingly purchased a license from an unauthorized reseller. If you have asked for a refund, you will no longer be eligible to use CCleaner Professional, and your license will be deactivated. There may be a few reasons why your license has been deactivated. If your license status is ‘License Deactivated’ You can see your license status within the CCleaner app (see the top grey bar, over to the left). If your version of CCleaner no longer works as it used to (for example, you have lost access to some features), it may have either expired or deactivated.

Valid ccleaner pro license