Many virtualization applications depend on hardware virtualization extensions that are available on most modern processors. It includes Intel VT-x and AMD-V. Only one software component can use this hardware at a time. The hardware cannot be shared between virtualization applications.
To use other virtualization software, you must disable Hyper-V Hypervisor, Device Guard, and Credential Guard. If you want to disable Hyper-V Hypervisor, follow the steps in next two sections.
Turn off Virtual Machine Platform Windows Feature
Hyper-V, Windows Hypervisor Platform and Windows Sandbox should be turned off
Restart your PC
How to disable Hyper-V
You can disable Hyper-V Hypervisor either in Control Panel or by using Windows PowerShell.
Disable Hyper-V in Control Panel
To disable Hyper-V in Control Panel, follow these steps:
In Control Panel, select Programs and Features.
Select Turn Windows features on or off.
Expand Hyper-V, expand Hyper-V Platform, and then clear the Hyper-V Hypervisor check box.
Disable Hyper-V in PowerShell
To disable Hyper-V by using Windows PowerShell, follow these steps:
Open an elevated PowerShell window (run as admin).
Run the following command:
Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Hypervisor
if you have windows home edition, run the following command to disable Hyper-V
bcdedit /set hypervisorlaunchtype off
Also look How to Fix «Side Channel Mitigation» on VMware Workstation
Also look what installed as additional programs on your windows system:
DISM /Online /Get-Features
Feature Name : HypervisorPlatform
Feature Name : VirtualMachinePlatform
need to disable
Also read how to Enable Hyper-V:
Enable Hyper-V using PowerShell
Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
Enable Hyper-V with CMD and DISM
DISM /Online /Enable-Feature /All /FeatureName:Microsoft-Hyper-V