I would ditch the BT stuff, it's truly awful, and may conflict with your Mcafee AV.
Your firewall should be left enabled unless Mcafee specifically asks that it be disabled. It's been a while since I used it but more information here:
If this is the product you have installed, then you need only supplement it with one of the free (not real time) scanners that you should update at least once a week, and run every couple of day's...You don't have to Mcafee is pretty good, but the free version of Malwarebytes can be downloaded from:
With the two kept up to date you should be fine.