Recently i am using McAfee and it got expired, I have AVG virus protection always on and windows XP firewall enabled. Why do I still get infected with some Trojan horses? I check for updates every day so I am sure I am up to date.Can anyone tell me the best antivirus of 2010.. There are so many on net so it made me confused and drag me here to ask in the forum..

NOD32 from ESET is the only antivirus I recommend at the moment.

http://www.eset.com

I totally agree with "Spunner"
I was using AVG free version before 2009 and in 09 I purchase the licence version of NOD32 and I was relax regarding all such stuff like virus, malware, firewall and such. Since then I didn't found any virus or malware in my computer.
I suggest NOD32 is best among all other.