("PC" is referred to the PC that was directly connected to cable modem / DSL modem before you start this LRP project, see this diagram)

For newer PCs, the default factory setting (right out of the box from factory) should work except when the PC has "software firewall" installed, it may interfere with the DHCP in obtaining an IP address. In that case, adjust your "software firewall" settings to allow DHCP (UDP ports 67 and 68) to go through your "software firewall".

Windows XP:  Use the default "factory settings".
Click Start...Control Panel...Network Connections....right click on Local Area Connection.... Properties... Internet Protocol (TCP/IP)...Properties, make sure "Obtain IP automatically" is checked and "Obtain DNS automatically" is checked. Pop a command screen, type
ipconfig /renew
You should see a line that says IP Address...192.168.10.x
and Default Gateway ...192.168.10.1
The exception being that if the PC comes "factory-installed" with a "software firewall", you may have to configure the "software firewall" to allow DHCP.

Win2000:  Use the default "factory settings".
On the My Network Places icon, right click, select Properties, choose Local Area Connection, right click, select Properties, Highlight TCP/IP and choose Properties, make sure IP is in "auto" and DNS is in "auto", click OK. Pop a command screen, type ipconfig /renew
You should see a line that says IP Address...192.168.10.x
and Default Gateway ...192.168.10.1
The exception being that if the PC comes "factory-installed" with a software firewall, you should make sure it allows DHCP to work.

Windows NT:
On the Network Properties icon, right click, select Properties, click Protocols, TCP/IP, Properties, check "Obtain IP Address from a DHCP server".  Pop a command screen, type ipconfig /renew
You should see a line that says IP Address...192.168.10.x
and Default Gateway ...192.168.10.1

Win98 and Windows ME:
On the Network Icon, right click, select Properties, highlight TPC/IP (for your network card) and click Properties, IP address should be "automatic", DNS should be "disable" (meaning obtain DNS from the DHCP server on the LRP), Gateway should be "blank" as shown. Reboot and surf.   Note: this is exactly the "factory default" setting.
The exception being that if the PC comes "factory-installed" with a software firewall, you should make sure it allows DHCP to work.

To confirm the settings, click Start...Run....winipcfg, you should an IP Configuration windows like this. Select the Ethernet Adapter in the drop-down box, the IP address should be 192.168.10.xx, Subnet Mask 255.255.255.0, Default Gateway 192.168.10.1

The following site gives some more information about DHCP configurations.
http://support.shaw.ca/troubleshooting/dhcp.htm