Detach e.g. unmount of the VHD via disk management in Windows 8.1 or 10 is quite simple and needs no skills!
Run the Windows disk management in Windows 8.1, for example via keyboard shortcut [Windows logo] + [X] and in the Windows-X menu, select the Windows 8.1 option disk management!
Identify the VHD on the blue icon! A mouse right click will open the drop-down menu with the option "Separate virtual hard disk"!
If you select this, the virtual disk is not more visible in MS Explorer, or in other file managers, such as for example Q-Dir!
... Why can I not delete a VHD file in Windows 8.1 or 8?
... How to mount in Windows-8 and 8.1 virtual disks like ISO images or VHD drives?
FAQ 211: Updated on: June 24th 2015 12:14