The "the boot configuration data for your pc is missing or contains errors" errors indicates that the boot configuration data (BCD) is lost or corrupt, causing the system to fail to enter Windows normally. 1. After using Windows to install USB disk, use the command prompt to repair the boot record and rebuild the BCD; 2. If there is no USB disk but you can enter the recovery environment, you can try automatic repair through the "Auto Repair" tool in "Troubleshooting"; 3. Check the hard disk connection status and partition status to ensure that the disk and partition are correctly identified, and adjust the partition properties if necessary; 4. Manually rebuild BCD: Back up the original BCD file in the command prompt and use the bcdboot command to recreate the BCD from the system directory. After completion, restart the system and restore normal.

When the computer starts, the boot configuration data for your pc is missing or contains errors, which means that your startup configuration data (BCD) is missing or an error occurs. This problem usually causes the system to fail to enter Windows normally and can only enter the recovery environment. Don't worry, the following methods can help you solve it.

1. Use the installation USB drive to repair boot (most commonly effective)

If you have a Windows USB drive installed, this is the most direct solution. After inserting the USB drive, restart the computer and boot from the USB drive (you may need to press F2/F12/Del and other keys to set the startup sequence when powering on).

Go to Repair Computer > Troubleshooting > Advanced Options > Command Prompt, and then enter the following three commands:

• bootrec /fixmbr
• bootrec /fixboot
• bootrec /rebuildbcd

This fixes the main boot record, writes to the boot sector, and rebuilds the BCD storage. After completion, enter exit and try restarting.

2. Use the automatic repair tool (for those who are not familiar with the commands)

If you don't have a USB drive but can enter the "recovery environment" (that is, the interface after an error occurs), you can try "automatic repair".

Click Troubleshooting > Advanced Options > Automatic Repair. The system will try to fix the startup problem automatically. This process may take several minutes, and restart after completion to see if it returns to normal.

However, sometimes automatic repair may not solve the problem, so you still have to use the command line to manually operate it.

3. Check the hard disk connection and partition status

Sometimes the problem is not on the system files, but on the hard disk itself. For example, the hard disk interface is loose or the partition table is damaged, which may also cause BCD reading to fail.

You can try the following steps:

• After shutting down, check whether the SATA or M.2 interface is plugged in properly
• If it is an external hard drive, try changing to another interface or data cable
• Use diskpart in a command prompt to view disk and partition status:
  • Enter diskpart
  • Then enter list disk and list volume to see if the disk and partition are recognized normally

If you find that the system partition is marked as "hidden" or there is no assigned drive letter, you can also adjust it here.

4. Rebuild BCD manual operation (more advanced)

If you have entered the command prompt, but the above command does not completely solve the problem, you can try to rebuild the BCD more carefully.

First confirm the current system drive letter (usually C:), and then execute:

• cd C:\Windows\System32\config (assuming that the C disk is the system disk)
• ren BCD BCD.bak (Back up the original BCD file)
• Return to the previous directory: cd ..
• Run again: bcdboot C:\Windows /s C:

This command will rebuild the BCD file from the system directory to the specified system partition. Restart after completion to see if there is any improvement.

Basically these commonly used methods. Don’t panic when encountering this kind of problem, it can basically be solved step by step. The key is to prepare to install the USB flash drive and pay attention to backing up important data in daily life.

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