I would be very cautious about changing AVs, (anti-virus utilities).
There's nothing wrong with continuously changing of course, especially if using free scanners, but if you wait long enough in this discussion you will get every one of the recognised, and some unrecognised, AV scanners recommended by those who use them personally.
But I have two reasons for saying that.
1] Keeping one allows us to get used to it and its foibles, they all have them, and when we get to know software we become more comfortable with it, and that helps us use it at its best.
2] This one is a little more pragmatic but a little less scientific. I am a great believe in stability. I'm out of touch with much of the developed world it seems where we 'change' at a moments notice and demand results immediately. For example here in the UK we are continuously bombarded with TV advertising and cold call telephone calls telling us to 'switch energy providers', electricity and gas, to get the cheapest deals we can. Another example; if we have a mortgage, change lenders to get a better deal, can be arranged 'online' or 'over the phone', in minutes. Did I have an accident recently? take them to court, sue the hell out of them, no win no fees.
I got a text message recently referring to the accident I had recently and to get back to them so they could sue whoever did it. I did text back. I said I was "very worried" about what they said in their text because I didn't remember anything about an accident, and could they tell me more as i must have suffered amnesia. Needless to say, they never responded.
I don't do any of that, (I no longer have a mortgage anyway), but people don't understand my reluctance to change. And yet I see them rushing about all the time wanting to change this, alter that, order something else and complain when its not delivered "immediately". I don't do rushing, and I complain very little.
The point of all that? I believe in a computer that works well with little that changes. I didn't in the past. My first computer I was continuously installing software, uninstalling software, deleting folders where software didn't delete properly, changing settings, and so on, and finally my system gave up. I think it was exhausted! So I stopped doing that and now I prefer a stable system with which I think carefully and long before I add or remove software. I think I'm on a winner with this philosophy, but others might disagree.
Er.. sorry for the lecture. Not what I intended,