Best Anti-virus programs to use that requires low resource usage

Armymanis

Distinguished
Nov 5, 2011
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So title says it all. I have been using Norton products since the day I bought a computer and have found that it is pretty much a resource hog when I am trying to play video games like the newest game Battlefield 3. What antivirus software is a low resource hog and does not take up many resources to run the computer? I would prefer free, but I can buy it as well if that needs to be necessary.