VMX / SVM Is Not Supported

Go to Control Panel → Programs and Functions → Enable or disable Windows Functions.
Make sure Virtual Machine Platform and Hyper-V are disabled.

If the error persists, open Command Prompt as administrator and run:

bcdedit /set hypervisorlaunchtype off

Press Enter and restart the computer.

Windows 11 Additional Fix

If the previous methods do not help, run PowerShell as administrator and enter the supplied commands:

takeown /F "C:\Windows\System32\hvix64.exe"

icacls "C:\Windows\System32\hvix64.exe" /grant *$(([System.Security.Principal.WindowsIdentity]::GetCurrent()).User.Value):For

takeown /F "C:\Windows\System32\hvax64.exe"

icacls "C:\Windows\System32\hvax64.exe" /grant *$(([System.Security.Principal.WindowsIdentity]::GetCurrent()).User.Value):F

del "C:\Windows\System32\hvix64.exe"

del "C:\Windows\System32\hvax64.exe"

Warning

These commands modify/delete Windows hypervisor system files. Use this procedure only for the specific error described above.