ERROR_SPECIAL_USER - 1373 (0x55D)
Cannot perform this operation on this built-in special user.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_SPECIAL_USER error code (1373, 0x55D) indicates that a specific operation cannot be performed on a built-in special user account. This error is indicative of a limitation in the system's capability to execute certain actions within the context of these accounts.
Error Details
This error typically arises when an attempt is made to modify or perform operations on a built-in special user account, such as SYSTEM, LOCAL SERVICE, or NETWORK SERVICE. These accounts are reserved for system use and have specific roles that prevent them from being altered in certain ways by non-administrative users.
Usage Context
This error code is relevant when dealing with administrative operations on the Windows operating system. It is commonly encountered during attempts to change user properties, permissions, or other settings associated with built-in special accounts.
Developer Interpretation
Developers should interpret this error as a signal that certain operations are not supported for specific types of users. This can be particularly relevant when writing administrative tools or scripts that interact with the Windows API. The presence of this error indicates that the operation attempted is not feasible within the constraints imposed by the system.
Related Errors
ERROR_ACCESS_DENIED(5, 0x5): Indicates a more general access violation.ERROR_INVALID_PARAMETER(87, 0x57): Suggests an invalid parameter was passed to the API function.
FAQ
Q: Can this error be resolved by changing user permissions?
A: No. This error is related to the inherent limitations of built-in special users and cannot be circumvented through permission changes.
Q: Is there a way to bypass this limitation?
A: Bypassing these limitations typically requires administrative privileges or modifying system files, which are not recommended due to potential security risks.
Summary
The ERROR_SPECIAL_USER 1373 error code signifies that an operation cannot be performed on a built-in special user account. Developers should handle this error by ensuring that operations involving such accounts are executed with appropriate administrative permissions and understanding the inherent limitations of these system-defined users.