diskpart
>select vdisk file=d:\VHDOS\w10x64_tmp.vhdx
>merge vdisk depth=1
del D:\vhdos\w10x64_empt.VHDX
del D:\vhdos\w10x64_tmp.VHDX
diskpart
CREATE VDISK FILE=D:\vhdos\w10x64_empt.VHDX PARENT=D:\vhdos\w10x64_chd.VHDX
CREATE VDISK FILE=D:\vhdos\w10x64_tmp.VHDX PARENT=D:\vhdos\w10x64_chd.VHDX