I have a 64 bit Acer lap top with WINDOWS 7. my Norton and McAfee antivirus has expired and I want to get the best one for the money for me. i primarily use this for surfing the net and Facebook.
Avast and Avira are both free. Both are solid with Avira currently ahead in detection rate.
If you don't mind paying, NOD32 has the best combination of ease of use, performance, small footprint, high detection rate and low false alarms.