Clean Master (developed by Cheetah Mobile) has been flagged by security experts for being unnecessary, requesting excessive permissions, and acting more like adware than a performance tool Performance:

Searching for and using "extra quality" activation keys from unverified sources is a primary vector for .

Instead of chasing risky "66 extra quality" codes, try this free maintenance routine:

– Once popular, it’s now widely flagged by security experts as potentially unwanted software (PUP) that can be misleading about system “junk” and may harvest user data.