Unable to boot : please use a kernel appropriate for your cpu

If you get this message in Virtualbox : 

        Unable to boot - please use a kernel appropriate for your CPU

There are a few things you can do to make it work.

Solution 1

Reboot your physical machine and go in your BIOS at start.

Enable Intel VT (Virtualization Technology) or AMD-V (AMD Virtualization) depending on your processor's type.

If you don't have this option, try solution 2.

Solution 2

Run VirtualBox.exe, click Settings, select System in the left pane then go in Processor tab.

Check Enable PAE/NX.

Solution 3

This message could mean that you are trying to run a 64 Bits operating system with a non 64-Bits compatible processor.

Recreate your Live USB using a standard 32 Bits ISO instead of a 64 Bits one.