1. Boot Configuration Data Bcd
2. Repair Bcd Windows 10
3. File Boot Bcd Error

At Microsoft support page, I found this howto (using the Windows 7 Recovery Disc): bcdedit /export C: BCDBackup C: cd boot attrib bcd -s -h -r re. Stack Exchange Network Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

I was prompted to write this post as a result of Windows 10 Professional recently attempting to do a silent update while I was waiting in an airport which I unknowingly interrupted when I powered down my -based laptop prior to boarding the plane.When I later powered on the laptop, it failed to boot and simply displayed the following message:A Boot Configuration Data (BCD) store (there can be more than one) contains boot configuration parameters which control how the operating system is started in Windows 10. First introduced in Windows Vista, these parameters were previously stored in the boot.ini file on BIOS-based platforms and as NVRAM variables in UEFI-based platforms.

If the BCD store is missing, becomes corrupted, or is not properly configured, Windows 10 will not boot.Here are two graphics which provide an overview of how a UEFI-based platform boots into the Windows 10 operating system:I assume by now that the majority of readers of my blog are quite familiar with UEFI-based platforms so the contents of the above graphics should be self-explanatory. Both graphics come from a UEFI-plugfest presentation by Murali Ravirala of the Microsoft Kernel Platform Architecture Team. Note that the Microsoft Boot Manager ( bootmgfw.efi) is the only executable in the boot sequence which actually accesses the BCD store.When you do an Internet search for how to fix BCD-related errors, you will find many articles explaining how to use the bootrec utility to effect the repair. Typically the described repair procedure is similar to the following.

X:bootrec /scanosScanning all disks for Windows installations.Please wait, since this may take a while.Successfully scanned Windows installations.Total identified Windows installations: 1The operation completed successfully.X:del d:bootbcdX:bootrec /rebuildbcdScanning all disks for Windows installations.Please wait, since this may take a while.Successfully scanned Windows installations.Total identified Windows installations: 11 D:WindowsAdd installation to boot list? Yes /No /AllHowever, what is rarely pointed out to readers is the fact that the bootrec utility is not useful on UEFI-based platforms.

It only works with with older BIOS-based systems which use an MBR (Master Boot Record) for booting!On UEFI-based platforms, you should use the bcdedit command-line utility to manage BCD stores on your system. It has been available in all versions of Windows since Windows 7. Note that administrative privileges are required to use bcdedit to modify a BCD store. Furthermore, the BCD store is no longer located by default at c:bootbcd but instead is located at /efi/microsoft/boot/bcd.By the way, on a Windows 10 UEFI-platform you can delete the entire c:boot folder. It really serves no useful function except as a quasi-backup of the Windows-related boot files in the ESP. I deleted this folder and it’s contents when I installed Windows 10 and have never run into an issue with it not being there.Here is what I saw on my laptop after I used my Windows 10 USB-based install media (never travel without a Windows 10 install media!) to get to a recovery command prompt and used bcdedit to enumerate all the default BCD store entries:Both entries appear to be normal.Note the extra (and critical for repairing the BCD store) information displayed when the /enum all switch is added.

• 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'. The full path to this file is 'active partitionBootBCD'. (On UEFI/GPT the full path is 'EFI system partitionEFIMicrosoftBootBCD').
• BCD is listed in the World's largest and most authoritative dictionary database of abbreviations and acronyms BCD - What does BCD stand for? The Free Dictionary.

This article needs additional citations for. Unsourced material may be challenged and removed.Find sources: – ( May 2010) The process of Windows NT 6 ( and ) and their successors differs from the startup process part of.In this article, unless otherwise specified, what is said about 'Windows Vista' also applies to all later NT operating systems. For Windows Vista, the or loads the Windows Boot Manager (a file named BOOTMGR on ), accesses the Boot Configuration Data store and uses the information to load the.

Then, the BCD invokes the boot loader and in turn proceeds to initiate the. Initialization at this point proceeds similarly to. Contents.History Windows Vista introduces a complete overhaul of the Windows operating system loader architecture. The earliest known reference to this revised architecture is included within slides distributed by during the of 2004 when the operating system was codenamed 'Longhorn.' This documentation mentions that the Windows operating system loader would be undergoing a significant restructuring in order to support and to 'do some major overhaul of legacy code.' The new boot architecture completely replaces the architecture used in previous versions of.Most of the steps that follows the, including kernel initialization and user-space initialization, is kept the same as in earlier NT systems.

Refactoring in resulted in being completely replaced for Credential Providers and graphical components in Windows Vista and later. Boot Configuration Data. Windows Boot Manager (BOOTMGR) with Windows 7 highlighted and options to load Windows Vista through BOOTMGR and XP through NTLDR.Boot Configuration Data (BCD) is a firmware-independent for configuration data. It is used by Microsoft's new Windows Boot Manager and replaces the that was used by NTLDR.Boot Configuration Data is stored in a data file that has the same format as hives and is eventually mounted at registry key HKEYLOCALMACHINEBCD00000 (with restricted permissions ). For UEFI boot, the file is located at /EFI/Microsoft/Boot/BCD on the. For traditional BIOS boot, the file is at /boot/BCD on the active partition.Boot Configuration Data may be altered using a command-line tool (bcdedit.exe), using (regedit.exe), using, or with third-party tools such as, BOOTICE, or Visual BCD Editor.Boot Configuration Data contain the menu entries that are presented by the Windows Boot Manager, just as boot.ini contained the menu entries that were presented by NTLDR.

Boot Configuration Data Bcd

These menu entries can include:. Options to boot Windows Vista and later by invoking winload.exe. Options to resume Windows Vista and later from hibernation by invoking winresume.exe. Options to boot a prior version of the Windows NT family by invoking its NTLDR. Options to load and to execute a.Boot Configuration Data allows for third-party integration, so anyone can implement tools like diagnostics or recovery options.Boot loaders winload.exe The Windows Boot Manager invokes winload.exe—the operating system —to load the operating system kernel executive and core. In that respect, winload.exe is functionally equivalent to the operating system loader function of in prior versions of Windows NT.

In systems, the file is called winload.efi and the file is always located at windowssystem32boot.winresume.exe If the computer has recently, then bootmgr will instead invoke winresume.exe. The only difference is the alternate boot mode and the splash screen displaying 'Resuming Windows'. In UEFI systems, the file is called winresume.efi and is always located at windowssystem32boot.Advanced Boot Options With the advent of the new boot manager in, many components have been changed; one is the Advanced Boot Options menu that provides options for advanced boot modes (i.e. Due to the implementation of in and up, access to the Advanced Boot Options menu has been disabled by default. However, access is still possible with a BCD modification. These are the possible boot modes:.

Repair Your Computer - Boots (WinRE or Windows RE). Safe Mode - Loads Safe Mode, a boot mode with minimal drivers and resources intended for malware removal or replacing faulty drivers. Why does the hound hate bronn. Safe Mode with Networking - Loads Safe Mode along with the network drivers. Safe Mode with Command Prompt - Loads Safe Mode with the as the shell instead of. Windows Explorer can still be loaded by typing explorer at the command prompt. Enable Boot Logging - Enables writing of ntbtlog.txt, a file that will log the boot process; listing drivers that loaded and drivers that did not.

Repair Bcd Windows 10

Enable low resolution video - Disables the default graphics driver and uses the standard driver. Intended in case the user changed the resolution to an unusable level (i.e.

320×200 at low refresh rates ). Last Known Good Configuration - Loads configuration based on the last successful boot process. Intended for corruptions. ^ de Boyne Pollard, Jonathan. Frequently Given Answers. Inside the Windows Vista Kernel – Startup Processes. Retrieved 2010-10-01.

^ (February 4, 2008). Retrieved April 18, 2015. Ritz, Andrew (2004). Archived from (PPT) on June 9, 2004.

File Boot Bcd Error

Retrieved April 18, 2015. Retrieved 4 December 2014. ^ (8 November 2011). Microsoft Corporation. Microsoft TechNet. Retrieved 9 November 2011.

Microsoft. Pauly. Bo Yans.Further reading.