The computer maintenance program CCleaner, which has been sharing opinions for years, has been targeted by Microsoft. According to Bleeping Computer, Windows antivirus Microsoft Defender Antivirus (formerly Windows Defender) now alerts CCleaner because it has been classified as a potentially unwanted application. Bleeping Computer is a partner of CCleaner developer Piriform.

The rating only applies to the free version of CCleaner. According to Microsoft, this is because the free version includes offers for other applications and offers to install them. Piriform considers the classification to be an error and seeks to overturn it. Piriform told Bleeping Computer that its other programs, such as the Recuva file recovery tool, have also been classified as potentially unwanted.

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CCleaner has long been a very popular application for cleaning your computer of useless files and repairing your Windows registry. IS Digitoday became acquainted with it in 2017 shortly after it was earned to share the malware.

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In our experiment, CCleaner proved to work, and it provided significantly more disk space for the test machine, among other things. However, the importance of the program has diminished as Windows has learned to take better care of itself and clean up the slag without outside programs.

Microsoft believes that registry cleaners can do more harm than good to your computer.