BlackSheep
I've read lots of good reviews for ZoneAlarm (a "learning" firewall, takes a wee time to get it trained apparently) and would use it, but am happy (I think) with the XP, which performed 100% at a test site.
https://www.grc.com/x/ne.dll?bh0bkyd2 (this one, called shields up).
MikeJ,
(also see above re: ZoneAlarm) I understand that feeling, but have come to the conclusion that it's sometimes not money well spent. I wasted a few $ on a Norton suite, that doesn't integrate well with the way I want to use this (XP) computer. Apart from my nasty little adventure the other night, I've found the freebies work very well, but might consider purchasing the Ewido, if it doesn't still work well after 14days.
MS "beta" (Giant) is replaced by windows defender (my Beta expires in about 120days) but the reviews I've read about Defender have been a little less than glowing. Limited configuration options etc.