Virtualbox or VMWare conflicting with Hypervisor. No VT-x support.

If you have Microsoft Hypervisor installed, it will take up the cpu VT-x so any other Virtual Machine System will accuse that your system hasn't support to virtualization. You need to disable its launching to release the cpu VT-x support to other VM like Oracle Virtualbox or VMWare.
Source

::
:: Hypervisor VT-x cpu hook flipper
:: Need administrator privileges
::
@cls
@echo off
net session >NUL 2>&1
if %errorlevel% neq 0 (
    echo Administrator privileges required!
    pause
    exit
)
echo:
for /f "tokens=2" %%G in ('bcdedit /enum active ^| find "hypervisorlaunchtype"') do set "$status=%%G"
if /i [%$status%] EQU [off] (
        echo Hypervisor is unavailable [OFF]
        set "$message=Should I bring it up? "
        set "$command=auto"
        
) else if /i [%$status%] EQU [auto] (
        echo Hypervisor is available [ON]
        set "$message=Should I bring it down? "
        set "$command=off"
) else (
        echo:
        echo Something is wrong. Status unknown or Hypervisor not installed.
        echo bcdedit /enum active | find "hypervisorlaunchtype"
        pause
        exit 1
)
choice /c:ny /t 30 /d n /m "%$message%"
echo:
if errorlevel 2 (bcdedit /set hypervisorlaunchtype %$command%
        echo:
        echo You need to restart the OS for changes to take effect.
        pause)
exit 0