Hi friends, there are so many antiviruses available, and I always recommended AVG 2013, but if you want another antivirus free of cost, then Bitdefender will be a nice one. It launched it's official free version for basic pc protection. It is very light and easy to use. It does everything automatically. It does not have any settings option and not any custom update option. Well, you can give it a try and you will like it. It runs on windows 8 too.