ERROR_SECUREBOOT_POLICY_VIOLATION - 4421 (0x1145)
The value is protected by Secure Boot policy and cannot be modified or deleted.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_SECUREBOOT_POLICY_VIOLATION (4421, 0x1145) indicates that an attempt was made to modify or delete a value that is protected by the Secure Boot policy. This policy enforces certain restrictions on system components and settings to ensure the integrity of the boot process.
Error Details
This error typically occurs when an application or driver attempts to alter a setting or file that is safeguarded by the Secure Boot mechanism. The Secure Boot policy is designed to prevent unauthorized modifications, ensuring that only trusted software can run during the boot process.
Usage Context
The context in which this error might be encountered includes:
- Attempts to modify system files or registry keys related to Secure Boot.
- Efforts to change settings within the Secure Boot configuration.
- Operations on protected components of the operating system that are integral to the boot sequence.
Developer Interpretation
Developers should interpret this error as a signal that their application is attempting an operation that is not permitted by the current Secure Boot policy. This could be due to incorrect usage or an attempt to bypass security measures intended to protect the integrity of the boot process.
Related Errors
ERROR_FILE_NOT_FOUND(2, 0x2)ERROR_ACCESS_DENIED(5, 0x5)ERROR_INVALID_PARAMETER(87, 0x57)
FAQ
Q: What does the ERROR_SECUREBOOT_POLICY_VIOLATION error mean?
A: This error indicates that an attempt was made to modify or delete a value protected by Secure Boot policy.
Q: How can I resolve this issue?
A: Ensure that your application is not attempting to change settings or files that are protected by the Secure Boot mechanism. Consult the documentation for any specific requirements related to Secure Boot and ensure compliance with these policies.
Summary
The ERROR_SECUREBOOT_POLICY_VIOLATION error code (4421, 0x1145) is a specific technical indicator that an operation was attempted on a value protected by the Secure Boot policy. Developers should understand this as a restriction imposed by the system to maintain boot integrity and ensure that their applications respect these constraints.