If none of the answers worked out for you, try this,
Hyper-V might not be disabled If you have windows 10 features such as Device Guard and Credential Guard is enabled, it can prevent Hyper-V from being completely disabled.
The Device Guard and Credential Guard hardware readiness tool released by Microsoft can disable the said Windows 10 features along with Hyper-V:
Download it here, https://www.microsoft.com/en-us/download/details.aspx?id=53337
Download the latest version of the Device Guard and Credential Guard hardware readiness tool. Unzip Open the Command Prompt using Run as administrator @powershell -ExecutionPolicy RemoteSigned -Command "X:\path\to\dgreadiness_v3.6\DG_Readiness_Tool_v3.6.ps1 -Disable" Reboot.