Get help with "There is an IP address conflict" message
This error message indicates that another computer on the network is using the same IP address that your computer is using. Each computer on a network must have a unique IP address. To fix this problem, run the Network troubleshooter.
Open the Network troubleshooter by right-clicking the network icon in the notification area, and then clicking Troubleshoot problems.
For more help with troubleshooting duplicate IP addresses, go to Resolving Duplicate IP Address Conflicts on a DHCP Network on the Microsoft website.