I use a laptop with Sonar and I use it with email and for all my regular Googling. I have Comcast, they offer free Norton 360, I use it. It works. I have Malwarebytes Premium. Windows-10, all is well. In the last couple of weeks I have had a strange problem with numerous website stopping to work, then I get a bar at the bottom to Recover the page... sometimes it works, usually not or only for less than a minute. I have not figured this one out.
My DAW is a Studiocat Prostudio. I have NO AV program on it. I have no emal on it. I do not surf the web on it. I use CCC, I use Tooktrack, IK, NI, update and download from XLN and things like that. I do use dropbox but I can check things on my laptop dropbox first. I don't have a pictures folder in my DAW dropbox and if anything other than what I want on my DAW shows up in the DAW dropbox, I just delete it.
I REALLY do not think you need AV software on a dedicated DAW. You do need to image and backup though... then you're OK.
Just use common sense and do DAW stuff. Look for stuff you're interested in on a different computer.
You are not likely to get any virus if you don't have any social media, no email, and sty off forums on your DAW.
YMMV