I tried running these commands in PowerShell, but bcdedit commands would not work even as Admin.
bcdedit /copy {current} /d "No Hyper-V"
# The entry was successfully copied to {01afc27f-do-not-use-5e2f3b11ce9a}.
bcdedit /set {01afc27f-do-not-use-5e2f3b11ce9a} hypervisorlaunchtype off
# The operation completed successfully.
To access this new boot menu, click the Windows Key, then Power and Restart but hold down Shift while clicking Restart with the mouse.
See https://msdn.microsoft.com/en-us/windows/hardware/drivers/devtest/adding-boot-entries , http://www.hanselman.com/blog/SwitchEasilyBetweenVirtualBoxAndHyperVWithABCDEditBootEntryInWindows81.aspx