Trouble making / dropping connection

My Bitdefender drops connection at least once an hour, oftentimes more, which is frustrating not only because I have to stop what I am doing to reconnect, but it often takes 3-5 minutes to reconnect. Is anyone else experiencing this? I wonder if the problem lies with my Internet provider (Xfinity by Comcast) or my modem/router Nighthawk by NetGear.