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I know how Windows Boot Manager (aka WBM, BOOTMGR) works. :P EFI or BIOS loads WBM, which resides in the EFI system partition or active partition (also tagged
by Dalewyn 4y ago
I know how Windows Boot Manager (aka WBM, BOOTMGR) works. :P
EFI or BIOS loads WBM, which resides in the EFI system partition or active partition (also tagged "System") as applicable, which then reads the Boot Configuration Data (aka BCD) also located in that partition. Windows itself is located in a separate partition from WBM and BCD.[1]
WBM then boots a specified Windows installation from a given partition, which is tagged as "Boot". If desired, WBM can also chainload into another bootloader (eg: NTLDR, Windows 9x bootloader, GRUB, etc.) to boot something other than Windows NT6 and up.[2]
[1]: https://en.wikipedia.org/wiki/Windows_Boot_Manager https://en.wikipedia.org/wiki/Windows_Boot_Manager
[2]: https://en.wikipedia.org/wiki/Booting_process_of_Windows_NT#Operating_system_selection https://en.wikipedia.org/wiki/Booting_process_of_Windows_NT#...