#checking the hyper-V state:

bcdedit

Windows Boot Loader
-------------------
identifier {current}
device partition=C:
path \WINDOWS\system32\winload.efi
description Windows 10
locale en-GB
inherit {bootloadersettings}
recoverysequence {a14884aa-6117-11e7-a334-f430b9153789}
displaymessageoverride Recovery
recoveryenabled Yes
badmemoryaccess Yes
isolatedcontext Yes
allowedinmemorysettings 0x15000075
osdevice partition=C:
systemroot \WINDOWS
resumeobject {a14884a8-6117-11e7-a334-f430b9153789}
nx OptIn
bootmenupolicy Standard
hypervisorlaunchtype Off

#turn on 

bcdedit /set hypervisorlaunchtype auto

#turn off

bcdedit /set hypervisorlaunchtype off

bcdedit