ERROR_FILE_NOT_ENCRYPTED - 6007 (0x1777)

The specified file is not encrypted.

Updated: Feb 21, 2026

Technical Background

The ERROR_FILE_NOT_ENCRYPTED error code, with the numeric value of 6007 and hexadecimal representation of 0x1777, indicates that a specified file is not encrypted. This error typically arises in scenarios where an operation requires encryption but encounters a non-encrypted file.

Error Details

This specific error code is associated with operations that expect the target file to be encrypted. When such an operation is performed on a file that lacks encryption, this error is returned. The exact nature of the operation can vary; it could be related to data protection mechanisms or security-related functions within the Windows operating system.

Common Causes

  • Invalid Parameter Values: An incorrect file path or handle may lead to this error if the specified file does not exist or is not encrypted.
  • Incorrect Object Type: The operation might expect a directory but encounters a file, leading to an unexpected result and this specific error code.
  • Exceeding Limits: There are no inherent limits that would directly cause this error; however, attempting operations on files in environments with strict security policies could lead to such errors if the file is not encrypted as expected.

Real-World Context

This error can occur in various scenarios where encryption is a requirement. For instance, when using data protection APIs or when performing operations that necessitate the presence of an encrypted file for security purposes.

Is This Error Critical?

The criticality of this error depends on the context and the operation being performed. If the operation requires an encrypted file to function correctly, encountering this error indicates a failure in meeting that requirement. However, it is not inherently a system-critical issue unless it impacts essential services or data integrity.

How to Diagnose

To diagnose this error, one should:

  • Review Operation Context: Ensure the operation being performed is appropriate for the file type and encryption status.
  • Validate Parameters: Check that all parameters passed to the function are correct and valid.
  • Confirm Object Types: Verify that the object types match the expected requirements of the operation. For example, ensure a directory handle is not used where a file handle is required.

How to Resolve

To resolve this error, consider the following steps:

  • Correct Parameter Usage: Ensure all parameters are correctly specified and valid.
  • Adjust Operation Context: If the context does not require encryption, adjust the operation accordingly. If it does, ensure that the file being operated on is properly encrypted before proceeding.
  • Restore Data: In cases where data corruption or loss might have occurred due to incorrect handling of encrypted files, restore the data from a backup if available.

Developer Notes

Developers should be aware that this error code indicates a mismatch between expected and actual file properties. It is essential to validate file encryption status before performing operations that require it.

Related Errors

  • ERROR_FILE_NOT_FOUND (2): This error might occur if the specified file does not exist, leading to an attempt at encryption or decryption on non-existent data.
  • ERROR_INVALID_PARAMETER (87): This could indicate a parameter issue unrelated to encryption but still relevant in diagnosing broader issues with file operations.

FAQ

Q: What does the ERROR_FILE_NOT_ENCRYPTED error mean?

A: It indicates that an operation was performed on a file that is not encrypted, despite the requirement for encryption.

Q: How can I prevent this error from occurring?

A: Ensure that all files intended for operations requiring encryption are properly encrypted before performing such operations. Validate parameters and object types to avoid mismatches.

Summary

The ERROR_FILE_NOT_ENCRYPTED error code (6007, 0x1777) is a specific indication of an operation being performed on a non-encrypted file where encryption is required. This error can be diagnosed by reviewing the context and parameters of the operation and resolved by ensuring that all files meet the necessary encryption requirements.