My minor contribution is "whatever else you consider, DON'T use Bitdefender!"
I escaped from Norton 'cos it was intrusive, went to Bitdefender, and it turned out to be 20 times as intrusive, slowed the PC down horribly, and didn't sort itself out, i.e. kept asking me if I wanted to update, or telling me there was an update, or even just not working 'cos it needed an update. Just get on with it, that's why I bought you! Its behaviour was also totally different between the desktop and laptop PC's, so I dumped it, and went back to Norton, which is now far less intrusive. May consider giving up and going for Windows defender in the next year or so, if only for the avoidance of paying money.