

The first is that deleting files will speed up your computer. It becomes harmful due to the malware that is hidden by hackers. Couple of questions Is CCleaner legit?ĬCleaner is a Windows application, which is useful for system optimization and maintenance and unused/temporary files removal. CCleaner malware was designed by hackers to steal sensitive data from unsuspecting users.A scan with the free version of Malwarebytes should enable you to get rid of any PUPs. It is possible that CCleaner may have tricked you into installing a PUP (potentially unwanted program) when you installed CCleaner. In September 2017, researchers discovered that CCleaner was compromised by hackers who inserted a backdoor into the software, enabling remote access of infected machines. But Avast has done some questionable things since the acquisition and that reputation has suffered. CCleaner can do that, so Microsoft does not want you to get the idea that you can use it with impunity or that they endorse it in any way.īefore the acquisition of CCleaner’s maker Piriform by Avast in 2017, CCleaner did have a good reputation. Microsoft strongly advises against allowing any program to mess with your registry. Microsoft is now detecting the popular CCleaner Windows optimization and Registry cleaner program as a potentially unwanted application (PUA) in Microsoft Defender.
