You know Windows has built-in support for mounting vhd disk images, right? You can just right click on the vhd-file, select the first option (in my Finnish Windows 10 it just says "Enable") and you can browse the files like on any normal drive.
Or if you prefer using the command prompt:
Code:
C:\Windows\system32>diskpart
Microsoft DiskPart version 10.0.14393.0
Copyright (C) 1999-2013 Microsoft Corporation.
On computer: ZPC
DISKPART> select vdisk file="C:\Users\zirkoni\VirtualBox VMs\FreeDOS\FreeDOS.vhd"
DiskPart successfully selected the virtual disk file.
DISKPART> attach vdisk
100 percent completed
DiskPart successfully attached the virtual disk file.
DISKPART>