Open CMD admin

bcdedit /copy {current} /d “No Hyper-V”

and will the following
The entry was successfully copied to {xxxxxxxxxxxx}.

copy the {xxxxxxxxxxxx} to the following command
{current} or the {other ID} – see pic

bcdedit /set {xxxxxxxxxxxx} hypervisorlaunchtype off

>>> should see
The operation completed successfully.

Then press and hold shift and restart

Go to select other OS , and chose windows or no Hyper V

🙂

https://www.hanselman.com/blog/SwitchEasilyBetweenVirtualBoxAndHyperVWithABCDEditBootEntryInWindows81.aspx