Fixing Ethernet connection issues in Windows 11 usually starts with the hardware: the cable, the router port, and a restart of your modem and router. If the wired connection still fails, you can check its status in Settings, run a few network commands, and reinstall the network adapter driver.
- Reseat the cable and restart the modem and router, then open Settings > Network & internet > Ethernet > Ethernet settings to check the connection.
- If the connection still fails, run the network commands in an administrator command window, in the order given below.
- Reinstall the Ethernet adapter driver next, and use a network reset only as the last resort.