I'm trying to get away from Norton (which was given to me), and noticed that Bitdefender is at the top of the list and has multiple awards. Although I'd like to hear from you guy who have it, and how you feel about it.
BitDefender is good , but is not free. (you can get a free edition if you have a Romanian proxy or VPN or maybe download from some sites if you can find it)
I also recommend Comodo.
Use MSE for prevention and Malwarebytes for search and destroy. The free version is all you need. Never waste money on AV.