Winnt32.exe [better] -

: Installs a new copy of Windows or upgrades an existing version while preserving settings and files.

When using /syspart: on a drive larger than 137GB without 48-bit LBA support, WINNT32 would write boot files beyond cylinder 1024, resulting in a "NTLDR is missing" error. Workaround required pre-partitioning with a utility like diskpart.exe before running WINNT32. WINNT32.EXE

Specifies the drive to which setup will copy start-up files; useful for preparing a hard drive for another computer. /unattend: : Installs a new copy of Windows or

: These allowed you to copy setup files to one drive but tell the installer that the system would eventually live on another—perfect for preparing hard drives for different machines. : The holy grail of mass deployments. By pointing to a WINNT32.EXE