I have been using ParetoLogic for a month now and it seems very good. The old model T is acting more like a new V8.
I agree with the others, anything that appears and you know you didn’t install it, get rid of it.
That said, I found a PC Mag review that gives it 4 stars, but I’m always suspicious of anything that is installed and I don’t know about it.
There is also a possibility it was installed along with software you installed and you didn’t watch the various install screens close enough, a common issue with software these days. A couple of things I’ve installed try to install various toolbars and such, I found out the hard way and started to watch the install screens more closely. They depend on people not watching and just letting it install to get various things on your computer and they usually are in place only to act as spyware.
CCleaner has a good reputation and Malwarebytes too, I’ve used both quite a bit.