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This guide provides steps to install Windows without using the normal setup (aka the "unintended" method) on Windows 8.1 and later on UEFI systems. Do note that setting up Windows using this method may break the system if the steps weren't followed correctly as it tampers the registry.
 * Boot into the setup media.


 * Press Shift to invoke Command Prompt
 * Partition the disk (these steps apply to clean disks)
 * Type.
 * Select the disk you want:  (get disk number by typing  )
 * Convert the disk to GPT:
 * Create boot partition (important)
 * cre par efi size=
 * for fs=fat32 quick
 * assign letter w


 * Create install partition:
 * (use  (in MB) to give it a fixed size or left intact to create based on all of the remaining disk spaces left)