I too have only had one virus experience like the seeker and it too dealt with using a shared computer at a school.

I also believe in using a a good virus scanner with auto protect enabled (I run Norton 2000).

I ran a firewall for about a week, but i didnt like the way it worked, so i burned it...er, uninstalled it. If anyone knows of a good firewall that is easy to set up, let me know.