When importing a virtual appliance from a VT-x machine into a non VT-x one, you may end up with this error:
VT-x is not available: verr_vmx_no_vmx
Well the key to fix this is to disable VT-x (i.e. hardware virtualization instructions) but the problem is that the new host machine’s virtualbox settings window is all disabled:
So how can I disable VT-x then? Then solution I found it to open the appliance vbox XML file and manually disable HardwareVirtualEx.
vim ~/VirtualBox\ VMs/windows/windows.vbox<br />
Then search for HardwareVirtEx and set all enabled items to false.