Restart your router — this reassigns IP addresses via DHCP, usually resolving the conflict. Release and renew IP — on Windows, run ipconfig /release then ipconfig /renew. This causes one or both devices to lose network connectivity, showing an error like "Windows has detected an IP address conflict. The ISP locks most of the features, the only useful ones unlocked are Wi-Fi, Port Forwarding, FTP and DDNS. Features I need that are disabled Out of 4 LAN ports, 3 are. Despite their robustness, fiber networks can fail due to: Physical Damage : Cuts, bends, or contamination in fiber cables or connectors. Hardware Failures : Faulty transceivers, switches, or routers. To fix a router IP address conflict, simply renew the IP address through your device's network settings or reboot your router.