I would say comodo internet security, now a new version has been released just go through this blog
http://www.downloadcrew.com/article/29240-comodo_internet_security_pro
For more details about this internet security you can visit...
Yeah they are expensive ,at the same time very powerfull to use it and its reliable and safe to use along with some good mobile security :) i has comodo mobile security on my android mobile and it acts best for my mobile ..
http://bit.ly/A34cXX