ERROR_DS_SAM_NEED_BOOTKEY_PASSWORD - 8529 (0x2151)
Security Account Manager needs to get the boot password.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_DS_SAM_NEED_BOOTKEY_PASSWORD (8529, 0x2151) indicates that the Security Account Manager (SAM) requires a boot password to proceed with an operation. This typically occurs in scenarios where the system needs to authenticate or access sensitive information during startup or recovery processes.
Error Details
The SAM is responsible for managing user accounts and security settings on Windows systems. When this error is encountered, it suggests that the system cannot continue without the boot password, which is a critical piece of information used in the authentication process.
Usage Context
This error code is most commonly observed during system startup or recovery processes where the SAM needs to authenticate with the boot password. It can also occur when attempting to perform operations that require elevated privileges and are protected by the boot password mechanism.
Developer Interpretation
Developers should interpret this error as an indication that the necessary authentication credentials (boot password) are missing or incorrect. This could be due to a variety of reasons, such as a forgotten password, system corruption, or issues with the boot process.
Related Errors
ERROR_DS_NO_BOOTKEY(8527): Indicates that no boot key is present.ERROR_DS_BAD_BOOT_KEY(8531): Suggests an incorrect boot key has been provided.
FAQ
Q: What does the error code 8529 mean?
A: The error code 8529, ERROR_DS_SAM_NEED_BOOTKEY_PASSWORD, indicates that the Security Account Manager requires a boot password to proceed with an operation. This typically occurs during system startup or recovery processes.
Q: How can I resolve this issue?
A: Ensure that you have the correct boot password and enter it when prompted. If you do not remember the password, you may need to reset it through safe mode or other recovery mechanisms provided by Windows.
Summary
The ERROR_DS_SAM_NEED_BOOTKEY_PASSWORD error code (8529) is a specific indication that the Security Account Manager requires a boot password for authentication. Developers should handle this error by ensuring proper authentication credentials are available and, if necessary, guiding users through recovery processes to resolve the issue.