I have recently installed an adsl wireless modem/router and a wireless adaptor to the other pc. Do I have enough protection ? I have Norton on new Dell pc and the modem router has a built- in firewall and I have enabled WEP. On the other pc I have Sygate including av (avast). Should I also install another firewall to new PC.Norton 2003 OEM for Dell version 9.05.15 I presume this is just an av and does not include a firewall as I can't find any firewall mentioned in help files. Your help will be appreciated!