I have WAN Miniport (Network Monitor) #2 network adapter with exclamation mark in device manager.

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Description says

This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)

The Uninstall button does nothing.

How to fix/uninstall?

  • What model of PC and Windows version do you have this problem on? I've had this problem on a Thinkpad T430 running Windows 8 and it has been an ongoing problem for months. Lenovo forums are packed with people with the same issue. – Moses Aug 31 '13 at 20:55

If you right-click on the WAN Miniport, select “Update Driver”.

Then select “Browse my computer”, Followed by “Let me pick driver from a list”.

Un-check “Show compatible hardware”. From the Manufacturer list, choose Microsoft, and from the Network Adapter list, choose “MAC Bridge Miniport”. (Choose any device. If un-sure, just select the first entry, which should be the: Generic Broadband device driver.

Back in the device manager, delete the “MAC Bridge Miniport” device.

Once you're done deleting the device, you MUST reboot your PC.

  • Good idea, thanks. Btw after reboot I lost network connection at all... – Dims Aug 31 '13 at 21:27
  • You lost connection? How did you sort it? Did you connect automatically or have to go into device manager again? Does 'Wan Miniport' show for you now or no? – BubbleMonster Aug 31 '13 at 21:29
  • Yes, connection was lost totally. I have D-Link router with DHCP, but main adapter was marked not connected in diagnostics. Never seen that before (not cable not connected or something common). I was to remove main network adapter entry, and also that Microsoft's with debug, and even after that I was not seeing network for some time. Now it went back and no WAN adapter anymore. – Dims Aug 31 '13 at 21:32

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