WARNING 1 Sharing a cable connection with ICS, you'll need two Network Adapters in the PC that you install ICS on. ICS will check for the proper network configuration and won't let the install proceed if it's incorrect.
WARNING 2 You need to install Win98SE, ME, W2K or XP only on the PC that you want to install ICS on. This must be the PC that is connected directly to the Internet via your cable modem . The other PC's on your LAN do not need to be upgraded to Win98 SE or ME, and can run on any operating system, as long as it supports the TCP/IP protocol.
WARNING 3 If you already have another sharing application like Sygate or Wingate installed, uninstall it before installing ICS. Some sharing programs (ICS included) take control of one or more of your Network adapters and/or Protocols.
WARNING 4 If you have already setup any of your client PC's with "Obtain an IP address automatically", shut down those PC's before you install ICS, otherwise you may get a IP conflict.
If you do get conflicts, you will get a popup message on the PC's that are conflicting. Reboot ALL machines that are conflicting one at a time and it should work itself out.