Does the router get a IP/Gateway/DNS from your cable modem?
Release/Renew if need be. If it starts with 168.0.?.? you have a problem. You may have to give your cable modem provider the mac address of your router.
Share your drives, make sure your all on the same workgroup. This will tell you if the switch portion of the router is working.
You can either let your system use DHCP to obtain an IP address or run static. You only need to do static if you want to remote control the systems, do some port forwarding, blada, blada bla.
Loose the Home Edition.