File Bcd Windows 10
Creates a new empty boot configuration data store. The created store is not a system store. /export: Exports the contents of the system store into a file. This file can be used later to restore the state of the system store. This command is valid only for the system store. Oct 20, 2016 Since you mentioned that the steps provided by Samuel Ngumii did not work in repairing your Windows 10 computer, we suggest that you click on the link below to for more options on how to resolve this issue: Recovery options in Windows 10. Let us know how it goes. Windows 10 Automatic Repair Loop, Startup repair could not repair your PC, 9 Easy Way Fixed 2019 - Duration: 27:55. T-Soln 100,325 views.
I was greeted by a Recovery error message the other day when I powered up a PC running Microsoft's Windows 10 operating system. The recovery screen stated that 'Your PC/Device needs to be repaired. The Boot Configuration Data for your PC is missing or contains errors'.
The PC shut down properly the day before and the whole thing was mysterious. The Recovery screen suggested to use recovery tools or contact a PC administrator or the PC/Device manufacturer for assistance.
Read on to find out how I repaired the PC and how you can do it as well.
Boot BCD startup errors
Boot problems related to the BCD come in many different forms. Here is a short list of error messages that Windows may throw during boot:
- Your PC/Device needs to be repaired. The Boot Configuration Data for your PC is missing or contains errors
- There was a problem with a device connected to your PC. An unexpected I/O error has occurred.
- Your PC needs to be repaired. The Boot Configuration Data file doesn't contain valid information for an operating system.
- Windows failed to start. A recent hardware or software change might be the cause.
One common denominator is that the Recovery screen references the file bootbcd.
Cause of BCD related startup errors
The error can be a result of (among other reasons):
- An unexpected shutdown.
- Bluescreen or other errors that require a restart.
- Data corruption.
- Failing hard drives.
- BCD file corruption or misconfiguration.
- Malicious software.
What is BCD?
Boot Configuration Data (BCD) was introduced in Windows Vista by Microsoft. It replaced the boot.ini file in Vista. The BCD holds important boot-related information including the list of the available operating systems.
In short, it stores vital boot information required to start Windows. If the BCD is missing, corrupt or altered, Windows may not start properly anymore but display the Recovery screen at the top.
Fixing BCD issues if you cannot boot
All issues described above have in common that you cannot boot into Windows anymore. You cannot use tools like the Visual BCD Editor to correct the issue on the affected machine because of that as you cannot boot into Windows anymore.
Generally speaking, it is required that you boot into the advanced startup (Windows 10 or 8.1) or system recovery options (Windows 7) and run several commands from the command prompt there.
If you do have Windows installation media, you can use it to boot from and access the recovery options.
Windows 10 users can download media from Microsoft instead.
Step by Step guide
- Insert the installation media into the PC. Connect the USB Flash Drive to the computer or put the DVD into the DVD drive.
- Find out how to access the BIOS/UEFI of the machine. This should be displayed during boot. Common keys are F1, F12 or DEL.
- Change the boot order so that the computer boots from the USB or DVD drive before it boots from internal hard drives.
- Click next on the first screen of setup. That screen should highlight the installation language and keyboard.
- Select Repair your computer on the next screen.
- When the 'choose an option' menu opens, select Troubleshoot.
- Select Advanced options.
- Select Command Prompt. This opens a command prompt interface.
- Run the following commands one after the other:
- bootrec /fixmbr -- This option writes a MBR to the system partition but does not overwrite the system partition in the process. It fixes MBR corruption and issues with non-standard MBR code.
- bootrec /fixboot -- This options writes a new boot sector to the system partition. Fixes damaged boot sectors, non-standard boot sectors, and issues caused by the installation of earlier Windows operating systems (pre-Vista). Ignore any error that may come up.
- bootrec /rebuildbcd -- This options scans all connected hard drives for Windows installations. If it finds additional installations, prompts you to add them to the BCD Store. Windows should pick up the installed operating system. Make sure you add it to the BCD store. Select (a) for all during the prompt, or add installations individually instead.
- Exit the command prompt window.
- Restart the PC to find out if the repair was successful.
Video walkthroughs
Resources
Related articles
Win 10 Bcd
BCDEdit is a command-line tool for managing Boot Configuration Data (BCD).
BCD files provide a store that is used to describe boot applications and boot application settings.
BCDEdit can be used for a variety of purposes, including creating new stores, modifying existing stores, adding boot menu options, and so on.
You'll need administrative privileges to use BCDEdit to modify BCD. Start the Command Prompt (Admin) or use Windows PE.
A normal shutdown and reboot is necessary to ensure that any modified BCDEdit settings are flushed to disk.
BCDEdit is included in the %WINDIR%System32 folder.
BCDEdit is limited to the standard data types and is designed primarily to perform single common changes to BCD. Related resources:
- Some common BCD operations, such as recovering a partition or setting up a new PC's system partition, may be more easily accomplished by using BCDboot.
- For complex operations or nonstandard data types, consider using the BCD Windows Management Instrumentation (WMI) application programming interface (API) to create more powerful and flexible custom tools.
BCDEdit Command-Line Options
The following command-line options are available for BCDEdit.exe.
BCDEdit /Command[Argument1] [Argument2] ..
Help
| Option | Description |
|---|---|
| /? [commmand] | Displays a list of BCDEdit commands. To display detailed help for a particular command, run bcdedit /?command, where command is the name of the command you are searching for more information about. |
Operating on a store
| Option | Description |
|---|---|
| /createstore | Creates a new empty boot configuration data store. The created store is not a system store. |
| /export | Exports the contents of the system store into a file. This file can be used later to restore the state of the system store. This command is valid only for the system store. |
| /import | Restores the state of the system store by using a backup data file previously generated by using the /export option. This command deletes any existing entries in the system store before the import takes place. This command is valid only for the system store. |
| /store | This option can be used with most BCDedit commands to specify the store to be used. If this option is not specified, then BCDEdit operates on the system store. Running the bcdedit /store command by itself is equivalent to running the bcdedit /enum active command. |
| /sysstore | Sets the system store device. This only affects EFI-based systems. It does not persist across reboots, and is only used in cases where the system store device is ambiguous. |
Operating on entries in a store
| Option | Description |
|---|---|
| /copy | Makes a copy of a specified boot entry in the same system store. |
| /create | Creates a new entry in the boot configuration data store. If a well-known identifier is specified, then the /application, /inherit, and /device options cannot be specified. If an identifier is not specified or not well known, an /application, /inherit, or /device option must be specified. |
| /delete | Deletes an element from a specified entry. |
| /mirror | Creates mirror of entries in the store. |
Changing entry options
| Option | Description |
|---|---|
| /deletevalue | Deletes a specified element from a boot entry. |
| /set | Sets an entry option value. |
For example, this command will enable the system to trust Windows Insider Preview builds that are signed with certificates that are not trusted by default:
Reboot after running the command. To turn off flightsigning:
Controlling output
| Option | Description |
|---|---|
| /enum | Lists entries in a store. The /enum option is the default value for BCEdit, so running the bcdedit command without options is equivalent to running the bcdedit /enum active command. |
| /v | Verbose mode. Usually, any well-known entry identifiers are represented by their friendly shorthand form. Specifying /v as a command-line option displays all identifiers in full. Running the bcdedit /v command by itself is equivalent to running the bcdedit /enum active /v command. |
Controlling the boot manager
Bcd File Corrupt Windows 10
| Option | Description |
|---|---|
| /bootsequence | Specifies a one-time display order to be used for the next boot. This command is similar to the /displayorder option, except that it is used only the next time the computer starts. Afterwards, the computer reverts to the original display order. |
| /default | Specifies the default entry that the boot manager selects when the timeout expires. |
| /displayorder | Specifies the display order that the boot manager uses when displaying boot options to a user. |
| /timeout | Specifies the time to wait, in seconds, before the boot manager selects the default entry. |
| /toolsdisplayorder | Specifies the display order for the boot manager to use when displaying the Tools menu. |
Emergency Management Services options
| Option | Description |
|---|---|
| /bootems | Enables or disables Emergency Management Services (EMS) for the specified entry. |
| /ems | Enables or disables EMS for the specified operating system boot entry. |
| /emssettings | Sets the global EMS settings for the computer. /emssettings does not enable or disable EMS for any particular boot entry. |
Debugging
| Option | Description |
|---|---|
| /bootdebug | Enables or disables the boot debugger for a specified boot entry. Although this command works for any boot entry, it is effective only for boot applications. |
| /dbgsettings | Specifies or displays the global debugger settings for the system. This command does not enable or disable the kernel debugger; use the /debug option for that purpose. To set an individual global debugger setting, use the bcdedit /setdbgsettings type value command. |
| /debug | Enables or disables the kernel debugger for a specified boot entry. |
| /hypervisorsettings | Sets the hypervisor parameters. |
To troubleshoot a new installation, enable debug mode by modifying the boot configuration file (BCD). For example, use the following syntax to enable kernel or boot debug.
-or-
where <id> is the GUID of the Loader object that is used to load the operating system. 'Default' can be used if the operating system is the default option of the Boot Manager menu.
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For examples of BCDEdit, see Boot Configuration Data in Windows Vista.
Repair Bcd File Windows 10
Remote event logging
| Option | Description |
|---|---|
| /eventsettings | Sets the global remote event logging parameters. |
| /event | Enables or disables remote event logging for an operating system entry. |