clean sysprep image and dism image capture

 these in red vary.

to put an existing image in oobe mode, press windows key + R and type
%windir%\system32\sysprep\sysprep.exe /audit /reboot
​after rebooting, delete all existing users and proceed with the commands below.

dism /Online /Cleanup-Image /StartComponentCleanup /ResetBase

dism /Capture-Image /ImageFile:B:\install.wim /CaptureDir:A: /Name:"Win 10 Pro" /Compress:max

small diskpart commands guide: 

diskpart
list disk
select disk 0
list part
select part 3
assign letter=A
select disk 1
create part pri
select part 1
format fs=ntfs quick
assign letter=B