I am trying to take a machine from a physical machine to a virtual. I created a vhdx of the hard drive with the systinternals disk2vhd tool.

The vhdx is on a usb hard drive. I attached the drive to another machine and created a new virtual machine in Hyper-V that used the vhdx. When I start the new virtual machine, it give an error message indicating that there is a boot failure do to the fact that no bootable media was found.

Is there a way to diagnose this problem? I can verify that the virtual machine is using my vhdx file which was created from a physical hard drive that is certainly bootable.