I am running XPsp3(32bit) on a laptop with AviraFree and MBAM Pro. I have a dialup internet connection so I am concerned about producing drag on the system and browsing. I have never used a firewall so I have some questions: Is a firewall essential? Is Private Firewall better than Windows XP Firewall? Why? Which is lighter on resources and internet drag? Is there a better free recommendations other than Windows FW or Private FW? Thank you for your help.