How to set up virtual network adapters?

Question

Hyper-V

There is a server on hyper-v, where the "Virtual Machine Backbone Network Adapter #1" was configured to sit down. I
have not yet figured out what happened to it, but refused to work. Deleted, added a new connection. "Virtual machine backbone network adapter #2"
I drive in the network settings, and it says to me that such an ip is already configured for connection #1
In the device manager it is not there, I checked the box to show hidden devices.
Where to dig?

Answer 1

Well, he writes the same .. "This IP is already configured for another adapter. Are you sure you want to use it, YES or CANCEL?" So tell him YES and everything will be fine.
It stores IP addresses in the registry. There is no point in looking. Moreover, you said that there is no such adapter either. It's just records in Windows remained.

Answer 2

As far as I understand, you removed the network adapter in the "Hyper-V Manager" for a specific virtual machine. But it remained with her in the "Device Manager" (inside the virtual machine), while this adapter is not displayed there, but it is there! It must be found and removed. To do this, we launch the virtual machine, log in to it, do Win + Break in it, thereby getting into the "System" window. There, click "Advanced system settings" and go to "Environment Variables". Here we add a variable called DevMgr_Show_NonPresent_Devices and assign it a value of 1. After that, going to the "Device Manager", click on the root of the tree with devices, then in the "View" menu, enable the "Show hidden devices" item. That's all. It remains to go to the "Device Manager" in the branch "Network cards" and remove your old network adapter. It will be displayed there in a pale gray color, such as Disabled. Exactly the same will be displayed all other devices that were once in the system, but are currently absent.