i also use malwarebytes on most of my machines. i was paying as little as 7 bucks for them as they were clearing out their free lifetime updates on newegg, 1 machine, but if you uninstall through the control panel, they let you install it on another machine.
i gave my extended family member my last unopened copy of it, and she found nothing on her server 2011, but on her connecting laptop malwarebytes found 8 problems in the first 39 seconds, she has norton 360 installed on that laptop, no clue how many it eventually found, but the server was clean and took over an hour, so 8 in 39 seconds impressed her, but still think she is at mercy of the gang of ransome ware folks. read somewhere it is fastest growing internet crime, she hadn't clicked on link to see how much they were asking for, so i don't know that yet as we were trying to restore her backup every way i know