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

enter image description here

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?

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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
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1 Answer

up vote 2 down vote accepted

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.

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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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