I have noticed that many, if not all of these so-called 'cleaners' have other annoying software bundled with them.
It is this bundled software that, then slows down your computer whilst, you are sitting there feeling smug for using a cleaner, as it is whirring away in the background taking up resources willy-nilly.
There is hardly ever a 'custom' option to install like there is with, professionally developed, paid-for-software and never an uninstaller.
There are tools already installed within your operating system, to remove unwanted software and these are free also!
Using of these 'cleaners' will bugger up your operating system. They will encourage you to 'clean' deeper into the workings of your computer, for false dawns, whilst you render it beyond repair and losing valuable data and treasured photographic memories.
I am fortunate enough to have more than one computer, often made from throwaway items, that nobody wants anymore, except me!
I have backed up data that unshackles me to test these claims.
What you then save via using junk, can be put to better use elsewhere like employing a computer engineer to build you another.
A fragmented reply, from a fragmented life, that is fragmented into computer data.
Your computer is a mirror image, an extension of you, as one gets older and slow (like overladen vehicles), protesting 'til they die.