I have AVG 8.5 Free, Spybot S&D, Malwarebytes Anti-Malware, Windows Firewall, Firefox 3.5(which I use the most) and Internet Explorer 8. I’m Using Windows XP Professional Edition With all Microsoft Updates Except Windows Live Essentials and Windows Search 4.0. WHAT ELSE COULD I ADD TO HELP PROTECT MY COMPUTER FOR FREE?