I can gaurentee you that Malwarebytes is one of the best!!!!
It is extremely good!
Download from malwarebytes.org
The problem is that malwarebytes is not an antivirus software. Its a passive anti-malware software (unless you pay for active protection) but even then it doesn't cover all the aspects of an antivirus.
"There is enough on earth for everybody's need, but not for everyone's greed." - Mohandas Gandhi