MS: Unnamed VM could not initialize error on Hyper-V

When you migrate or move (manually) virtual machines, between different hard disks or servers, you will receive the following error:

An error occurred while attempting to start the selected virtual machine(s).

Unnamed VM could not initialize.

Solution: Download Hyper-V Unnamed VM Fix tool from http://ctxadmtools.musumeci.com.ar/HyperVHotFixes