I WAS USING NORTON AND MY SYSTEM IS SLOW.SO I REMOVED AND INSTALLED NORTON INTERNET SECURITY 2005 . IAM TELLING THAT IS THE WORLD FAMOUS AND BEST BECAUSE IT HAS ANTISPAM,ANTIVIRUS,FIREWALL AND EVERYTHING INSIDE JUST UPDATE IT AND BE PROTECTED LIKE A SPIDER WEB AND ALSO MICROISOFT ANTI SPYWARE ACTS AS A FIREWALL PARTIALLY..

THIS IS MY OPINION