I suggest getting SUPER AntiSpyware also.
I don't leave it on though, I run it once a week to clean my system of cookies and malware.
Used to use Malawarebytes but that will find like 10 things and when I run SUPER AntiSpyware right afterwards it finds 1,300 things that Malawarebytes skipped.
I was told it's just deleting cookies and garbage files, but what's wrong with that?