I have uninstalled McAfee from my fathers PC and decided to let him try a 1 month trial of Bitdefender Pro 9, as personally I think that BD Pro 9 is a better product and is up there with NOD32, KAV and F-Secure. He's been using McAfee for the past 8 yrs and I now think its time for a change to something different. Now my Q here is should I disable his Windows XP Firewall or leave it enabled, as the BD Pro 9 also has a firewall in it as well. I have read that by rights there shouldnt be two software firewalls running but only one. What are your thoughts ?