MalwareBytes and Avast are the ONLY anti-virus I have used for well over a decade and I have never gotten hit with anything they could not fix.
I support then and purchased the products BECAUSE the free version worked so well.
They are not a ‘waste of money’ they have some useful additional features which I like a lot. (you don’t need them at all, but they are like the leather seats and tinted windows on a car- nice features to have)
I supported them and bought them because after a decade of great service I felt like I should. I’d like them to stay in business.
You’re free to feel otherwise-I use my computers for a living so it means a lot more to me than others, probably.
I agree with Mr. K's statements -- it's handled anything I've encountered. Staying away from hazardous parts of the internet helps too. $:-)
Avast also has some nice system cleanup and tuneup tools in their paid version, but there are other freeware apps for those functions.