error VT-x is not available VERR VMX NO VMX

Question

I am trying to start a virtual machine. I am using Virtual Box. I get the following error when I try to start it:

VT-x is not available (VERR_VMX_NO_VMX).

Answer 1

Hi@pam,

There are few reasons behind this error. Le's discuss these.

• Check VT-X is enabled in the BIOS settings or not. If not than enable it.

• Check if Hyper-V virtualization is enabled in Windows. This is the most common cause why this error occurs. Since .Microsoft’s Hyper-V technology is known to conflict with VT-X, the OS will automatically disable VT-x if Hyper-V virtualization is enabled. To disable this use the bellow command from Windows PowerShell. 

  dism.exe /Online /Disable-Feature:Microsoft-Hyper-V

• Disable Core isolation from Windows Defender.

Hope these steps will solve the error.

Thank You

Answer 2

This may be due to the Virtualization option is not enabled for the CPU in the local machine's BIOS and this is required since Hipchat Server guest OS is 64-bit.

• Enable the Virtualization option in the local machine BIOS and restart the computer.
• If the BIOS does not have a Virtualization option or it is already enabled, please see this virtualbox forum post for additional workarounds.

Hope this will help to resolve your issue.

Answer 3

Either the VT-x is disabled in the BIOS settings or some settings on your computer are causing the error.