国内互联网上半天搜不到方案，还得是谷歌，没想到几年的bug微软竟然没有修复

• Hyper-V Create External Virtual Switch Issue – Microsoft Q&A
• Hyper-V virtual switch creation woes – Rob Pomeroy

附带Craig的说明：

I had this same issue with the Intel Wifi 6 AX201 today. Here’s what I discovered.

When I created the Hyper-V External switch for the first time, it failed to create with an error about not being able to find some component. And of course, I was no longer connected to any wireless network. I tried the usual things of course (MS diagnostic fixer, netcfg -d, etc), nothing worked. BUT, I did notice one thing. To get networking back, all I did was disable my wireless card and re-enable. But when I did that, the Network Bridge network device all of a sudden appeared in the network adapters list. Hmm, if only I could create a switch and tell it to “connect itself” to the bridge. But alas, that is not possible.

Then it hit me what the problem might be. Something is not working correctly such that, when trying to create the switch and attach it to the Network Bridge, the bridge could not be found. BUT when I disable/enable the WiFi card, the bridge magically “shows up”.

So, armed with this knowledge, I followed these steps:
1. Open Network Sharing Center
2. Click ‘Change Adapter Settings’ in the left-hand menu
3. Create the new External Switch in Hyper-V Manager. Or, you can also use New-VMSwitch PowerShell cmdlet. Both methods work.
4. While the “Applying” dialog is spinning away, or the PowerShell Progress “dialog”, switch over to the network adapters dialog you have open in Control Panel.
5. Disable your WiFi adapter
6. Reenable your Wifi adapter

In a few moments, your new Hyper-V External Switch should be created.