That´s what you shuld NEVER, EVER EVER rely on your own PC to do the connection with the broadband ISP, and you should instead install a home broadband router/firewall like the ubiquitous and inexpensive Linksys BEFR41 series.
Then, all you have to do from any PC, with ANY OS is set the router´s internal IP address (192.168.x.x or 10.x.x.x) as the "default gateway" for the TCPIP stack, and bingo, all machines have ineternet connectivity. In that case, the ISP log-in is handled by the home router, and configured by filling out 3 settings with a web form (connection type:[ ]DHCP [ ]PPPoE [ ]Fixed IP - Username [ ] and Password [ ] )
FC