PC > [Ethernet] > Router (LAN Port)
Router (WAN Port) > [Ethernet] > Cable Modem
Don't forget to turn everything off and then power back up in the following order, leaving a 5 minute pause between powering on devices):
Cable Modem
Router
PC
Once you got the Internet connection working correctly via a wired connection (and the router secured) you should be able to just disconnect the Ethernet cable between PC and Router and connect via the wireless.

to Cable Forum by the way
---------- Post added at 17:50 ---------- Previous post was at 17:48 ----------
Also.....
You shouldn't need a disc to go with the router, no drivers are required.