ERROR_NOT_ALLOWED_ON_SYSTEM_FILE - 313 (0x139)
Operation is not allowed on a file system internal file.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_NOT_ALLOWED_ON_SYSTEM_FILE error code indicates that an operation attempted on a file system internal file is not permitted. This typically occurs when the operating system restricts certain operations due to the nature of the file or its location within the file system.
Error Details
This error is specific to operations performed on files managed by the Windows file system, which are considered internal and cannot be directly accessed or modified by user-level applications. Examples include system files that are part of the operating system's core functionality, such as those used for booting or critical system processes.
Usage Context
The error is commonly encountered in scenarios where an application attempts to perform operations on system-managed files, which are protected from direct modification by user-level applications. This protection ensures the stability and integrity of the operating system.
Developer Interpretation
Developers should interpret this error as a restriction imposed by the file system or the operating system itself. It is not an indication of corruption or invalid input but rather a safeguard against unauthorized modifications to critical system files.
Related Errors
ERROR_ACCESS_DENIED(5) - Indicates that the user does not have sufficient permissions to perform the operation on a file or directory.ERROR_PATH_NOT_FOUND(3) - Indicates that the specified path is invalid and cannot be found.ERROR_INVALID_PARAMETER(87) - Indicates that one of the parameters passed in the function call was invalid.
FAQ
Q: What does the ERROR_NOT_ALLOWED_ON_SYSTEM_FILE error mean?
A: It means an operation attempted on a system-managed file is not permitted due to its protected nature.
Q: Can this error be resolved by changing permissions?
A: No, this error is related to the nature of the file and cannot be resolved by changing permissions. The file is protected from modification by user-level applications.
Summary
The ERROR_NOT_ALLOWED_ON_SYSTEM_FILE (0x139) error indicates that an operation attempted on a system-managed file is not permitted due to its protected status within the Windows file system. Developers should understand this as a safeguard against unauthorized modifications and not indicative of corruption or invalid input.