If your "vEthernet" adapters have disappeared or show errors in Device Manager:
Select your computer name at the top, then click . download hyper-v virtual ethernet adapter driver
Choose . Select Network adapters from the list. Choose Microsoft as the manufacturer and look for Microsoft KM-TEST Loopback Adapter or similar virtual drivers. 3. Troubleshooting Missing Adapters If your "vEthernet" adapters have disappeared or show
Downloading the Hyper-V Virtual Ethernet Adapter driver is usually unnecessary because the drivers are built directly into the Windows operating system. However, if your virtual machines (VMs) are missing network connectivity, you may need to manually enable the feature, update your host's physical drivers, or install Integration Services. 1. How to "Download" the Driver (The Official Way) update your host's physical drivers