Error 0xc0000034 Windows 10 Startup Configuration Data File is Missing

error 0xc0000034 windows 10 startup.

Error: Windows 10 startup configuration data file is missing

Question: "I have a Dell computer with Windows 10 installed for normal operation. But suddenly a blue screen appears, It prompts me that the startup configuration data file lacks necessary information when I start, and the error code is 0xc0000034. Are there any suggestions on how to make my Windows start normally? Thank you!"

Missing boot configuration data file

Why is the error "Missing boot configuration data file start" reported?

BCD, a database, can be used to load and run the operating system. In different boot modes, the location of BCD is different: for UEFI boot, the BCD file is located in /EFI/Microsoft/Boot/BCD on the EFI system partition; for BIOS boot, it is located on the active partition of /boot/BCD. If the file is damaged, in addition to the error 0xc0000034, similar startup BCD errors will appear in Windows 10, such as "Your PC's startup configuration data is missing or contains errors. The reasons that may damage the BCD file and cause the error are listed below: The boot configuration data file is missing the required information:

Extend the active system partition

Hard drive failure

Unexpected shutdown

Repair boot configuration data file missing in Windows 10 [with CD/DVD]

If you have a Windows installation CD/DVD, you can choose one of the following methods or There are multiple solutions to correct BCD startup errors.

Method 1. Fix BCD errors through startup repair

You can start repair automatically Fix the error. The detailed steps are as follows (take the Windows 10 installation disk as an example):

1. Insert the Windows 10 installation disk into the computer and start it.

2. When Windows is loading files... and the Windows start screen ends, select language, time, currency, and keyboard, or other input methods.

3. Go to Repair your computer>Troubleshooting>Advanced options>Startup repair

4. Wait patiently for the operating system to be repaired.

Method 2. Use the command prompt to fix the BCD error

If the startup repair does not work, you can try to fix the error manually through the command prompt.

Please follow the steps below:

1. Go to Repair your computer>Troubleshooting>Advanced options>System symbol.

2. Fix the MBR by running the following command:

  • ? bootrec.exe / fixmbr
  • ? bootrec.exe / fixboot
  • ? bootrec.exe / scanos
  • ? bootrec.exe / rebuildbcd

Or delete and rebuild BCD by typing the following commands, each command should be done by pressing Enter:

  • ? attrib –r –s –h c:\boot\bcd del c:\boot\bcd
  • ? bcdboot c:\windows

3. Restart the computer.

Method 3. Activate the Windows partition

Sometimes the partition where Windows is installed is not activated, which will cause Windows to fail to start and display the error message "Boot Configuration The data file is missing the necessary information.” So, just set up an active Windows partition to solve the problem.

Enter the command prompt, enter the following commands in sequence, and press Enter each time:

  • ? Disk part
  • ? List Disk
  • ? Select the disk number (# is the system disk number)
  • ? List volume
  • ? select volume # (# is the system volume number)
  • ? Activities
  • ? Exit

Repair the missing boot configuration data file in Windows 10 [No CD/DVD]

What if the media is not installed? What if you are not familiar with CUI? do not worry! You can use the GUI tool: AOMEI Partition Assistant Standard Edition to learn how to fix BCD errors, such as missing boot configuration data files in Windows 10. It is a universal and powerful tool for managing disks and partitions in Windows 10/8/7, XP, and Vista, allowing you to create bootable media and rebuild MBR.

Download for free and see how it works:

Step 1. Insert the USB drive into a computer running Windows. Install and run AOMEI Partition Assistant on your computer. Click Create boot device and follow the instructions in the wizard.

Step 2. Connect the bootable U disk created by AOMEI Partition Assistant to the computer that cannot be started, enter the BIOS to start Windows from the U disk.

Step 3. You will enter the main console of AOMEI Partition Assistant Standard Edition. Find the disk that needs to be repaired and select Rebuild MBR.

Step 4. Choose the appropriate MBR type according to your Windows operating system.

Step 5. Click Apply> to continue the operation. After repairing, restart the computer.


? This tool allows you to expand the C drive without deleting it, copy partitions in Windows, check bad sectors, etc.

? If you want to experience more advanced functions such as lost partition recovery and dynamic conversion to basic, you can upgrade to the professional version.


Through this article, you can get a simple and safe way to repair the missing startup configuration data files in Windows 10. Some information is needed for errors in Windows 10 and other similar BCD errors. But you cannot always fix multiple startup failures. Therefore, it is recommended that you back up the system in advance.

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