Thanks for replying Dmitri, I tried using windows repair but I have the same boot issue.

So the software just converts a disk for you to explore data and its no use at all for converting vm's to run on a different host?

Hi, I'm trying to convert a VMWare ESXi 6 vmdk guest file to HyperV vhdx. The guest is Server 2012 R2 Datacentre and the VMWare host is running version 9. The HyperV host is Server 2012 R2 Datacentre. The vmdk converts apparently successfully but once I start up the hyperv server I get a black boot ...