WAN Miniport (IP) Driver Error Lenovo Yoga Windows 8.1 (Code 31)
Posted by Russell Wright on November 11, 2013
I recently upgraded my Yoga 13 to Windows 8.1. While looking around I noticed the WAN Miniport (IP) network adapter driver had a little yellow exclamation mark on it.
To fix this, I found KB2871372 which appears to identify and fix the problem.
I chose to “fix it myself” because I always like to get some idea of what’s going on. These are the instructions, copied and pasted, for your quick reference. Basically it appears you install the Microsoft KM-TEST Loopback Adapter and then uninstall it, scan for hardware changes and voilà, you’re done! The only problem I’ve seen with this is that it returns every once-in-a-while. Not sure why.
If you have already installed the operating system and are currently receiving a "code 31" error on the WAN Miniport (Network Monitor) device, follow these steps:
The WAN Miniport (Network monitor) device should now be started and no longer have a yellow exclamation mark next to it.
Of course, you can also select the Fixit button for Microsoft Fix it 20114 and let it do all the work.