Hello.

I had remove phisical network adapter from system.

Now i cant delete old virtual adapter from Hyper-V control panel!

I had tried script from article: http://blogs.technet.com/b/jhoward/archive/2009/07/01/hyper-v-how-to-remove-disabled-virtual-network-adapters-from-the-parent-partition.aspx 

But script not works on win8.1. (probable cause namespace root\virtualization not avail on win8.1).

Please help.

Correct - WMI v1 namespace calls will not work.

But the code can be updated by adding 'v2' to the WMI URI string  ..\virtualization\v2\....

Have you tried  the cmdlet "remove-vmswitch"

cmdlet "remove-vmswitch" throws exception:

PS C:\Windows\system32> Get-VMSwitch

Name   SwitchType NetAdapterInterfaceDescription
----   ---------- ------------------------------
HyperV External    м Realtek PCIe GBE
hV     Internal


PS C:\Windows\system32> Remove-VMSwitch 'hV'


     "hV"?
[Y]  - Y  [A]    - A  [N]  - N  [L]    - L  [S]  - S  [?] 
(м  м  "Y"):
Remove-VMSwitch :     мм Ethernet.
:1 :1
+ Remove-VMSwitch 'hV'
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Microsoft.HyperV.PowerShell.VMTask:VMTask) [Remove-VMSwitch], Virtualizat
   ionOperationFailedException
    + FullyQualifiedErrorId : Unspecified,Microsoft.HyperV.PowerShell.Commands.RemoveVMSwitchCommand

Changing namespace in script to "root\\virtualization\\v2" occurs next error: 80041088 on line 

this.m_VirtualSwitchManagementService = list.ItemIndex(0);

• Edited by Viktor Khokhryakov 11 hours 41 minutes ago

It is all about the physical adapter going missing.

Can you change the virtual network type to Internal?  This would remove any external NIC binding.

Another trick involves a utility to spoof a physical NIC (I don't think is publically available).

cmdlet "remove-vmswitch" throws exception:

PS C:\Windows\system32> Get-VMSwitch

Name   SwitchType NetAdapterInterfaceDescription
----   ---------- ------------------------------
HyperV External    м Realtek PCIe GBE
hV     Internal


PS C:\Windows\system32> Remove-VMSwitch 'hV'


     "hV"?
[Y]  - Y  [A]    - A  [N]  - N  [L]    - L  [S]  - S  [?] 
(м  м  "Y"):
Remove-VMSwitch :     мм Ethernet.
:1 :1
+ Remove-VMSwitch 'hV'
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Microsoft.HyperV.PowerShell.VMTask:VMTask) [Remove-VMSwitch], Virtualizat
   ionOperationFailedException
    + FullyQualifiedErrorId : Unspecified,Microsoft.HyperV.PowerShell.Commands.RemoveVMSwitchCommand

Changing namespace in script to "root\\virtualization\\v2" occurs next error: 80041088 on line 

this.m_VirtualSwitchManagementService = list.ItemIndex(0);

• Edited by Viktor Khokhryakov Thursday, April 23, 2015 7:42 PM

cmdlet "remove-vmswitch" throws exception:

PS C:\Windows\system32> Get-VMSwitch

Name   SwitchType NetAdapterInterfaceDescription
----   ---------- ------------------------------
HyperV External    м Realtek PCIe GBE
hV     Internal


PS C:\Windows\system32> Remove-VMSwitch 'hV'


     "hV"?
[Y]  - Y  [A]    - A  [N]  - N  [L]    - L  [S]  - S  [?] 
(м  м  "Y"):
Remove-VMSwitch :     мм Ethernet.
:1 :1
+ Remove-VMSwitch 'hV'
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Microsoft.HyperV.PowerShell.VMTask:VMTask) [Remove-VMSwitch], Virtualizat
   ionOperationFailedException
    + FullyQualifiedErrorId : Unspecified,Microsoft.HyperV.PowerShell.Commands.RemoveVMSwitchCommand

Changing namespace in script to "root\\virtualization\\v2" occurs next error: 80041088 on line 

this.m_VirtualSwitchManagementService = list.ItemIndex(0);

• Edited by Viktor Khokhryakov Thursday, April 23, 2015 7:42 PM

Type of virtual network is already Internal. Also can't change to anothe type - throws error.

In device manager two ones marked with yellow signs and is not removable from the system. I had tried to remove this devices in the safe mode - fail.

Hi Viktor Khokhryakov,
The main issue is to remove the virtual adapter from the machine ,right ?
Have you tried to remove it from the configuration tab ?
Here is a link for reference:
Add or remove a virtual network adapter
https://technet.microsoft.com/en-us/library/cc708372%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396

We also can check the folowing link , take Nick Ferreri`s and Rasmus Jacobsen`s suggestions to have a check .Please back up the registry keys before we tried to make modifications to it.
hyper-v networking woes
https://social.technet.microsoft.com/Forums/windowsserver/en-US/f6673b1e-f8dc-47c9-80ff-178db17b2962/hyperv-networking-woes?forum=winserverhyperv

Best regards