You really should have only a single third-party malware suite installed on your machine. With the virulent digital infections swarming the internet these days, it is (not accusing, just saying to anyone) the height of foolishness to depend upon a number of freeware applications to safeguard your security. You could get away with that fifteen years ago, but not today. There are God-knows-how-many malicious jerks cooking up all kinds of deviltry on their Ubuntu machines (which, incidentally, are almost impossible to infect, unless the administrator is the sort of rocket scientist that blindly goes OK-OK-OK-OK through all root permissions dialogues) for no other reason than they hate Microsoft or Apple or both. Personally, I favor Webroot. Twelve years ago I had a terrible virus I couldn't handle with all the freeware I had installed. Then I tried paid protection, and here's the list of all the "guys" that not only couldn't fix the problem, but couldn't even detect the nasty infection:
Bitdefender
Norton/Symantec
Kapersky
McAfee
Avast!
AVG
Malwarebytes
TrendMicro (this is an Evil Empire product, by the way...Luke...I am your father...)
ESET
There were a couple of others, but I can't recall them at the moment. Long story short: Too many cooks in the kitchen may not only spoil the broth, but ruin everything else, too. Pick one guy, not just a cook, to manage your "kitchen," but a chef. If you have to pay someone to work for you, then pay a guy who knows WTF he's doing.