bcdedit /export C:\bcd_backup attrib C:\boot\bcd -s -h -r ren C:\boot\bcd bcd.old bootrec /rebuildbcd
bootsect /nt60 sys /mbr A corrupted SYSTEM registry hive breaks boot with errors like 0xc000021a or 0xc0000034 . The recovery environment allows you to replace it with a backup copy.
bootrec /fixmbr bootrec /fixboot bootrec /scanos bootrec /rebuildbcd If still failing, rewrite the entire boot sector:
bcdedit /export C:\bcd_backup attrib C:\boot\bcd -s -h -r ren C:\boot\bcd bcd.old bootrec /rebuildbcd
bootsect /nt60 sys /mbr A corrupted SYSTEM registry hive breaks boot with errors like 0xc000021a or 0xc0000034 . The recovery environment allows you to replace it with a backup copy.
bootrec /fixmbr bootrec /fixboot bootrec /scanos bootrec /rebuildbcd If still failing, rewrite the entire boot sector:
