Cannot mount or move Virtual Hard Disk .vhdx file

Question

I created a .vhdx file using disk2vhd from sysinternals, but I'm unable to use it. The virtual machine in Hyper-V won't start.

I can't mount it either. I t gives me the following error even though I have full control permissions.

Couldn't mount File
You don't have permission to mount the file.

When I try to move it, I get the error :

The action can't be completed because the file is open in System.

I checked that Hyper-V does not use it. I even deleted the virtual machine to be sure it is not used by Hyper-V.

What could I try else ?

Solution

The tool from Sysinternals is quite old now. You could check out the official tool from Microsoft. Microsoft Virtual Machine Converter. It will convert other VM's and physical disks to Hyper-V readable drives.

Comments

[Lorenz Meyer]

The problem was disk2vhd. I made a full backup and restored it to the virtual machine. This worked.