Only thing I can really say on the subject, is that I used to have the free versions of both Malwarebytes & AVG; now I have the fully paid up "Pro" versions of both. I have just seen the grief that getting hacked, or infected, can produce and if the money prevents the grief ; then it's worth it in my book. A friend of mine got his computer infected with a rootkit and it was almost impossible to get rid of, so in his case the computer went into the bin. It depends what you've got on your computer and what you use it for, in terms of importance & security; but it should be noted that Malwarebytes doesn't scan for rootkits and I would not be surprised if quite a few others don't either........AVG does....and you really don't want to get infected by one of those.