load and execution of Windows NT6 loader - file "winload.exe" from \Windows\System32 folder.
load and execution of boot manager ("\bootmgr") from active partition and then display of boot menu (skipped if only one boot entry).
load and execution of partition boot record (PBR) on active partition.
load and execution of MBR (Master Boot Record) on first disk.
BIOS firmware initialization and self test (Power On Self Test - POST).
(On UEFI/GPT boot process depends on the presence of EFI System Partition(ESP) on hard disk)īIOS/MBR boot process from hard disk goes like this: Windows NT6 (Vista, Windows 7/8/10) BIOS/MBR boot process depends on the presence of an active partition on hard disk. (On UEFI/GPT the full path is "\EFI\Microsoft\Boot\BCD") The full path to this file is "\Boot\BCD". In Windows Vista, Windows 7, Windows 8/8.1 and Windows 10 the System Boot Configuration Data (BCD) is stored in a file in folder "\Boot". See how to create or obtain a Windows 7/8/10 installation/repair CD/DVD/USB. (use Visual BCD Editor or Dual-boot Repair tool to export/backup BCD or use "bcdedit /export backup-file-name" on elevated command prompt)
Windows utility "bcdboot.exe" can repair the system BCDĪlways have A Windows installation/repair CD/DVD/USB ready before attempting any repairs of boot related files !.
BCD can be accessed only with elevated administrative rights.
(on UEFI/GPT based installations the system BCD is on EFI system partition)
The system BCD resides on active (and primary) partition.
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