I put one of these junk cleaning/fix computer like programs on a (work) computer that was several years old, and never been cleaned before. The software didn’t change or affect performance. This kind of stuff don’t work at speeding up your computer. It might help with the Internet (maybe?). But, I think you are wasting your time with this stuff.
get grammatik. “this kind of stuff doesn’t xxx is much more impressive than “this kind of stuff dont xxxx …or if you prefer, these kinds of software dont…is ok too. it makes you seem a bit smarter. singular with singular…plural with plural
that being said the software is quite helpful on multiple computers…for years…it do work ;-))