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.