How to create *from 0* a bootable disk partition for windows 10?

Solution 1:

There are general steps in the BCDBoot docs: https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/bcdboot-command-line-options-techref-di#repair-the-system-partition

For UEFI the partition layout is documented at: https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/configure-uefigpt-based-hard-drive-partitions

1. Create a new "system" partition of approximately 250 MB:

   DISKPART> create partition efi size=250
   

2. Format using FAT32, and assign a temporary drive letter:

   DISKPART> format quick fs=fat32 label="System"
   DISKPART> assign letter="S"
   

3. Install the files needed by Windows boot manager, together with an UEFI NVRAM "boot entry":

   C:\> bcdboot C:\Windows /s S:
   

For BIOS the partition layout is documented at: https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/configure-biosmbr-based-hard-drive-partitions

1. Create a new "system" partition of approximately 100 MB:

   DISKPART> create partition primary size=100
   

2. Format using NTFS, and assign a temporary drive letter:

   DISKPART> format quick fs=ntfs label="System"
   DISKPART> assign letter="S"
   

3. Set the 'active' or 'bootable' flag for this partition:

   DISKPART> active
   

4. Install a partition boot sector:

   C:\> bootsect S: /nt60
   

5. Install a compatible MBR boot sector to the whole disk:

   C:\> bootsect S: /nt60 /mbr
   

6. Install the files needed by Windows boot manager:

   C:\> bcdboot C:\Windows /s S: