Repair or replace a partition boot sector.
Syntax BOOTREC /FIXMBR Write an MBR to the system partition. BOOTREC /FIXBOOT Writes a new boot sector onto the system partition. BOOTREC /SCANOS Scans all disks for Windows installations and display entries not currently in the BCD store. BOOTREC /REBUILDBCD Scans all disks for Windows installations and provide a choice of which entries to add to the BCD store.
/FixMbr does not overwrite the existing partition table. Use this option when you must resolve MBR corruption issues, or when you have to remove nonstandard code from the MBR.
Use /FixBoot if The boot sector was damaged or replaced.
Use Bootrec.exe to troubleshoot a "Bootmgr Is Missing" error.
If rebuilding the BCD store doesn’t resolve the startup issue, you can export and delete the BCD store and then run this option again. By doing this, you make sure that the BCD store is completely rebuilt. To do this, type the following commands at the Windows RE command prompt:
bcdedit /export C:\BCD_Backup
attrib bcd -s -h -r
ren c:\boot\bcd bcd.old
“If you want a picture of the future, imagine a boot stamping on a human face — forever” ~ George Orwell (1984)
BCDBOOT - Create or repair a system partition.
BCDEDIT - Manage Boot Configuration Data.
WPEUTIL - Run commands during a Windows Preinstallation Environment (WinPE) session.