at the moment i'm using the xp2 firewall - how good this is i don't know -does it stop trojans from transmitting info out of the pc onto the net? as i'm on a dial-up connection i haven't taken firewalls very seriously as i was under the impression you only needed one if you were using always on broadband. having become aware of keyloggers and what they can do i'm not so sure now so i'm thinking of installing a freebie firewall - zone alarm is favourite. is zone alarm any better than xp2 firewall? or do i have to pay for a commercial version to get sufficient protection? (assuming commercial versions are any better) does it detect trojans? does it block them? does it alert you?