ERROR_BAD_USERNAME - 2202 (0x89A)
The specified username is invalid.
Updated: Feb 21, 2026
Technical Meaning
ERROR_BAD_USERNAME, with the numeric code 2202 and hex code 0x89A, indicates that a specified username is invalid. This error typically occurs during user authentication processes, such as logon attempts or when validating usernames in applications.
Error Details
The term 'invalid' can encompass several scenarios:
- The username does not exist within the system's user database.
- The username contains characters that are not allowed by the system's naming conventions.
- The username is too long or too short, exceeding system-defined limits.
- There might be a typo in the username input.
Usage Context
This error code can appear in various contexts within Windows applications and services. It is commonly encountered during user logon attempts, account management operations, or when validating usernames in custom application logic.
Developer Interpretation
When encountering ERROR_BAD_USERNAME, developers should consider the following:
- Verify that the username input matches exactly with what is stored in the system's user database.
- Ensure that the username adheres to any naming conventions enforced by the system or application.
- Check for typos and ensure that the length of the username falls within acceptable limits.
Related Errors
ERROR_INVALID_PARAMETER(1208)ERROR_USERNAME_EXISTS(1345)ERROR_USER_ACCOUNT_DISABLED(1690)
FAQ
Q: What does ERROR_BAD_USERNAME mean?
A: It indicates that the specified username is invalid.
Q: How can I resolve this error?
A: Verify the correctness of the username input and ensure it meets system naming conventions and length requirements.
Q: Can this error occur in non-logon scenarios?
A: Yes, it can occur during any operation that requires valid usernames, such as account management or custom application logic.
Summary
ERROR_BAD_USERNAME is a generic error indicating an invalid username. Developers should focus on validating user inputs and ensuring they meet system-defined naming conventions and length requirements to prevent this error.