From another computer, navigate to your computer's manufacturer support site (if you own a branded PC or laptop) or to the motherboard's support site (for onboard network adapters) and download the latest driver version for the Network Controller. Download the latest Network Adapter Drivers.ġ. Install the latest driver for Network Controller to fix the Network Adapter Code 31 error. How to Fix the Network Controller Code 31 error in Device Manager. This tutorial contains detailed steps and instructions on how to resolve Ethernet Controller Code 31 error in Device Manager. At these cases you have to perform some additional steps to resolve the error code 31 in your Network Adapter. In several cases the Ethernet 'Code 31' error, can occur despite the fact that the correct driver of the Ethernet controller is already installed. When the Code 31 error occurs in one (or more) device(s), then the corresponding device appears with a yellow exclamation mark sign, next to it, in Device Manager. ' This device is not working properly because Windows cannot load the drivers required for this device. The full description of the 'code 31' error in 'Device status' information box is: Network Adapter Code 31 error in Device Manager may occur in a Windows based computer (Windows 10, 8, 7 or Vista) if the appropriate driver for the Network (Ethernet/LAN) controller is not installed properly or is corrupted.

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