After my internet provider restored my TV channels, my router's Wi-Fi settings were reset. Wi-Fi works normally, and one of my two wired PCs connects without any problems. However, the other PC reports that Ethernet doesn't have a valid IP configuration. ipconfig shows no default gateway or DHCP server, and the router lists that computer with a blank hostname and device type. I've already replaced the Ethernet cable, tried every router port, confirmed IPv4 and DNS are set to obtain addresses automatically, updated the LAN drivers, enabled the adapter, and uninstalled/reinstalled it through Device Manager. What else should I check to determine whether this is a Windows configuration problem or a failing network adapter?
1 Answer
The blank hostname in the router’s device list is not necessarily the cause; it usually just means the PC has not successfully completed DHCP. You can try a full network reset in Windows, restart the router and PC, and verify that no static IP, proxy, VPN, or third-party firewall configuration is interfering. If the reset changes nothing, hardware testing is the next logical step.
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