Installation disk
Rule number zero: Do not let any ISP's "installation disk" anywhere near your computer, at all, ever.
(It'll just pollute your machine with god knows what, and get in the way of you configuring it properly. If your ISP somehow manages to insist that you can't connect without using their disk then ... er ... choose a different ISP, there are lots out there.)
You do
not, by the way, want anything connected directly to the internet without a firewall these days.