I need to find another antivirus software and I was thinking of either Avira Free or Avast Free. Unfortunately I'm a little confused about something. I was told that Avira uses less system resources than Avast. But I don't see how. For XP, Avira requires 192 MB RAM and Avast requires 64 MB but 128 are recommended. So wouldn't that mean Avast uses less resources? Or am I completely misunderstanding this? If I am, please explain. Also, I thought Avira required a lot less than 192 MB RAM. One of the download sites linked off the Avira site say it requires 20 MB RAM. What's up with that?