Device Manager displays a Yellow Exclamation mark next to the WAN Miniport (Network monitor) Device. The Details tab of the device properties window includes the error code 31 and the following message:
"The device is not working properly because Windows cannot load the drivers required for this device. (Code 31)."
The error occurs because Windows was not able to load the drivers required for the WAN (Network monitor) device. Because there is no driver associated with the device, it cannot be removed from Device Manager.
The following configurations may be affected by this symptom:
To prevent the issue from occurring on future installs, the hotfix from KB Article 2822241 must be integrated into the install media that is used during setup. For information about how to use DISM to integrate a hotfix package into install media, see the following TechNet article at the following URL:
Microsoft has provided an automated solution at the web page located under the “Additional Information” section. To manually correct the error, please follow these instructions.
If the user has already installed the operating system and are currently receiving error code 31 on the WAN Miniport (Network Monitor) Device, the user can eliminate the error by completing the following steps:
See Microsoft Article 2871372 for more information at the following URL: