AVG is pretty decent but I use the one provided by my internet provider since its included, was using Norton before but found that it bogged my computer down
Go for Avast. I am using it with ZoneAlarm since last 3-4 years without having any problem till now. DON.
For each person theres a best diffrent one I tell you stay away from suspicious sites and activities online and you are 90% safe ...
I am using Eset Technologies for the past 3 years and I didn't have any problems. I think it is the best because it can be used for a high protection level at low resources.
I use AVG, the free edition is great as well. I dont recomend Norton at all, all it does it slow down your pc.
I am using using kaspersky for the last four years. I am very much satisfied with their service. After installing kasper sky my system is completely free from virus. I am usally using pen drive. When we insert pendrive kaspersky immediately shows the virus