Actually, there might perhaps exist a way how to convert older FCD Virtual CD backup images (.fcd) to Virtual Hard Disk files (.vhd) with IsoBuster, but overall fcd to vhd conversion does not appear to be straightforward or simple. But it is more likely that you will be only able to extract the contents of .fcd files. Once this is done, it might be possible to use the disk2vhd utility to generate vhd file from physical disk.Open FCD file Open VHD file
Disk2vhd is a utility that creates VHD (Virtual Hard Disk - Microsoft's Virtual Machine disk format) versions of physical disks for use in Microsoft Virtual PC or Microsoft Hyper-V virtual machines (VMs).
A highly specialized and easy to use CD, DVD and blu-ray data recovery tool