Which free anti virus is best which doesn't slow down your game playing?

Now using Avast! Home Edition. it's ok, but got other that's better?

Which free anti virus is best which doesn't slow down your game playing?malware

AVG Free from http://www.free.grisoft.com

Which free anti virus is best which doesn't slow down your game playing?norton 360

according to me.. i feel kaspersky is the Best,it protects from virus than AVG,Norton and doesnt slow down your system speed too.. so try it .. i have tried it!!
AVG

http://free.grisoft.com/

its really good but i think its a trial?
You should turn off antivirus while playing, if your computer isnt fast enough.
AVG
AVG...
avg is ok.