Why I like Malwarebytes...

Here's a good example of what I meant by saying this program finds things that others miss... This has a feature called "Chameleon" that runs when nothing else can, and it can find and fix problems with malware that might slip past the other detection systems. Here it is in action. I ran it because I saw a lot of unusual activity on my CPU Usage Meter, and something had hijacked my Google Search in Firefox, and switched it to Yahoo. I never use Yahoo, so that told me for sure something was going on...and this found it.

Malwarebytes has a freebie version, but I recommend the Premium one, because it has real-time protection, as well as other features. And it works!