Thanks for the advice, i think I get the idea. One thing is confusing me is that the W98 machine with ZA free version is able to use the chatroom with no problem, and I have never changed any of the settings.
Does this mean that ZA (free) is a lot weaker than ZA Pro and therefore allowing two way traffic with the chatroom and a lot less protection and leaving the pc vulnerable?
Also would the basic XP firewall offer enough protection on the XP machine that I could turn off ZA Pro when I wanted to use chatroom and keep ZA Pro on at all other times?
Thanks once again for the help.