ERROR_BADDB - 1009 (0x3F1)
The configuration registry database is corrupt.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_BADDB error code indicates that the configuration registry database is corrupt. This typically means that a critical section of the Windows Registry, which stores system and application settings, has become damaged or inconsistent.
Error Details
- Error Name: ERROR_BADDB
- Numeric Code: 1009 (0x3F1)
- Short Description: The configuration registry database is corrupt.
This error can occur due to various reasons such as system crashes, power failures, or software conflicts. It is a generic error that does not specify the exact nature of the corruption but indicates that the integrity of the registry has been compromised.
Usage Context
The ERROR_BADDB error code is commonly encountered during system startup, service initialization, or when attempting to access specific settings stored in the Windows Registry. Developers and administrators may encounter this error when troubleshooting issues related to system configuration or application behavior.
Developer Interpretation
When encountering an ERROR_BADDB, developers should interpret it as a signal that the registry database is in an inconsistent state. This could be due to various factors such as corrupted keys, values, or subtrees within the registry. The error does not provide specific details about the nature of the corruption but suggests that the system may behave unpredictably until the issue is resolved.
Related Errors
- ERROR_REGISTRY_CORRUPT (1930): Indicates a more severe corruption in the Windows Registry, often requiring a repair or restore operation.
- ERROR_REGISTRY_IO_FAILED (1928): Suggests that there was an I/O failure while attempting to access the registry, which could be related to hardware issues or temporary system instability.
FAQ
Q: What does ERROR_BADDB mean?
A: The error indicates that the configuration registry database is corrupt. It suggests that a critical section of the Windows Registry has become damaged or inconsistent.
Q: How can I resolve an ERROR_BADDB issue?
A: To resolve this issue, you should first attempt to repair the registry using built-in tools like sfc /scannow and chkdsk. If these do not work, consider performing a system restore or reinstalling affected components.
Q: Can an ERROR_BADDB affect system stability?
A: Yes, since the registry stores critical settings, corruption can lead to unpredictable behavior. It is advisable to address this issue as soon as possible to maintain system stability and performance.
Summary
The ERROR_BADDB error code indicates that the configuration registry database is corrupt. This generic error does not specify the exact nature of the corruption but suggests that the integrity of the registry has been compromised. Developers should interpret it as a signal for further investigation and potential repair or restoration of the registry.