How do I migrate Virtual Server 2005 VMs to Hyper-V?
— Uninstall Virtual Machine Additions from the VM you want to migrate. Next, move the Virtual Hard Disk (VHD) image to a location accessible by the Hyper-V Manager and build a VM that’s comparably configured. Finally, when prompted to create a new virtual drive, select the existing Virtual Server 2005 R2 VHD file. However, you’ll be prompted to reactivate because Windows will detect a massive hardware change.