Network Adapter Driver Windows 11 Not Working. Run the built-in network troubleshooter, located here: Settings > System > Troubleshoot > Other troubleshooters. If the device icon is greyed out, the network adapter is disabled.
If the network adapter is malfunctioning, it might be the reason your Ethernet cable is not detected.
Select Change adapter settings on the sidebar.
Simply download the driver installer application and run it.. Doing this will delete and then reinstall the Ethernet adapter, and reset various network settings to. In device manager under "Network Adapters"->"Realtek PCIe GbE Family Controller" I have an exclamation.