What does ‘VT-x is not available. (VERR_VMX_NO_VMX)’ mean in VirtualBox?


This error in VirtualBox is usually caused by one/more of the below:

  • You have Hyper-V virtualization enabled in Windows
  • Your CPU doesn’t support VT-x or AMD-V virtualization
  • VT-x or AMD-V is not enabled in BIOS (UEFI)
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