Overdrive
Is that the same BitDefender who have gotten into the habit of kinda posting subscribers' personal details on their site? It's happened twice recently so I wouldn't be keen on them!
As far as the software goes, I am happy with Avira AV, Comodo Firewall and I've started using Malwarebytes Anti-Spyware. All 100% free, non-bloatware software which is a piece of pee to remove if you decide to change your mind, unlike Norton. Also, the stuff I use was rated higher than things like Norton, etc, for detection/protection so I think it's the better option