> diskpart
> list disk
> select disk 0 (usually 0, which is the disk you want to image)
> clean
> list volume
> select volume 1 (drive C)
> delete volume
> create partition primary (This is will the default size left, or you could specify ex: create partition primary size=80000
> list partition
> select partition 1 (The newly created partition)
> format fs=ntfs quick
> active
> assign letter=c
> exit