Hyper-V Virtual Ethernet Adaptor - Code 31 in Device Manager

We are currently preparing a new Hyper-V host however have suddenly noticed that in Device Manager we have three driver issues all of which relate to Hyper-V. They are as follows.

Hyper-V Virtual Ethernet Adaptor
This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)

Hyper-V Virtual Ethernet Adaptor #2

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

Microsoft Hyper-V Network Switch Default Miniport

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

I did remove all Hyper-V instances as well as all Virtual Switches and then re-created them however these drivers still show up as problematic in Device Manager on the Host. Oddly enough this doesn't seem to be causing any issue with the Hyper-V instance in that we have installed Server 2012 onto it and it is able to gain full network/internet connectivity.

Thanks in advance.
kacklandAsked:
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Ayman BakrSenior ConsultantCommented:
Do you find this on the hosts or the VMs hosted? If on the VMs, then uninstall the Integration Components (ICs), cancel any New Device pop-ups that might appear and re-install the ICs.

You can also try doing this if the above didn't work: Delete the Config key under the registry path HKLM\SYSTEM\CurrentControlSet\Control\Network
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kacklandAuthor Commented:
Hi Mutawadi,

It is happening on the host only.

Should I still try the registry fix above?

Thanks
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Ayman BakrSenior ConsultantCommented:
Yes, try it on the host and then arrange for restarting it.
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