This is the actual error message I am getting in a WindowsXP system with TCP/IP Networking:
"The IP address 126.96.36.199 you have entered for this network adapter is already
assigned to another adapter 'Intel 8255x-based PCI Ethernet Adapter (10/100)',
'Intel 8255x-based PCI Ethernet Adapter (10/100)' is hidden from the Network
Connections Folder because it is not physically in the computer. If the same
address is assigned to both adapters and they both become active, only one of
them will use this address. This may result in incorrect system configuration.
Do you want to enter a different IP address For this adapter in the list of IP addresses in the Advanced dialog box?
YES or NO"