blogs[.]technet[.]microsoft[.]com/mmpc/2016/02/24/cleaners-ought-to-be-clean-and-clear/
"Cleaners ought to be clean (and clear)"
There are many programs that purport to clean up and optimize system performance. While Microsoft does not endorse the use of these tools with Windows, we do not view them as unwanted or malicious.Many programs in this category have a practice of providing a free version of their software that scans your system, presents the number of errors it found, and offers you to purchase the full version to remove these errors.
Microsoft security products, such as Windows Defender for Windows 10, will continue to classify optimization programs that do not provide details as unwanted software, detect and remove them.