norton is slow, takes up too much diskspace, makes your computer slow down, and you have to pay for a subscription every year, when basically norton 2000 does the same job as norton 2005. i use nod32, which is rated HIGHER than both of norton and mcafee and its only 7mb in size, and its faster, and you have unlimitied updates...
zonealarm is an excellent firewall, but sucks for antivirus
just get nod32 and zonealarm free edition