Hi 26 sw,
Thank you for posting in the Q&A forum.
Please open Windows PowerShell as administrator and run Get-VMSwitch to see if the virtual switches can be listed. If not, open services.msc from the start menu and restart the Hyper-V Virtual Machine Management service (vmms) manually. If the issue persists, check the Hyper-V-VMMS and Hyper-V-VmSwitch event logs located at Applications and Services Logs \ Microsoft \ Windows in Event Viewer.
Best Regards,
Ian Xue
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