Hardware Firewall vs Trojan Horse

[Animal555]

Hi, I have just reinstalled windows xp on one of my computers, so have not had the time to install a software firewall or antivirus yet. As luck would have it, one of the kids managed to get a trojan horse virus on the computer within a day of the reinstallation. Unaware of this, until I installed an anti virus program, I have been using the infected computer as normal i.e. accessing email, using passwords etc.

What I would like to is can the trojan horse send my personal information (email, passwords) from keylogging back to hackers if I have a hardware firewall, I have no NAT configured.

Thanks in advance!

 

[The Merlin]

Depends on your firewall, like say with Zonealarm it would have to ask you to be able to access the net