Which is the best anitivirus available today?

[Akshay]

Hi friends,

I am using Alvira now. So far its performance is pretty impressive. But my friends said that Avira can't detect spy wares. They are recommending Avast. I had used it earlier. But system became very slow when I used it. What do you say?

[domains]

I don't know which is the best, I have been using AVG antivirus.

[domainnames]

Maybe the system is slow if you are doing a system scan?