ERROR_CS_ENCRYPTION_FILE_NOT_CSE 0x80071785

Error code 6021 · HRESULT 0x80071785

WINDOWS

The SMB client requested a CSE FSCTL on a non-CSE file.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_CS_ENCRYPTION_FILE_NOT_CSE is a Windows error code (system error 6021, returned as HRESULT 0x80071785) reported by Windows. Its official message is: “The SMB client requested a CSE FSCTL on a non-CSE file.”

How to fix ERROR_CS_ENCRYPTION_FILE_NOT_CSE

  1. Verify the path/file actually exists and is not blocked by antivirus quarantine
  2. Reinstall the application that raised the error to restore missing files
  3. Check the full path spelling (long paths >260 chars need a registry opt-in)

Related errors

ERROR_CS_ENCRYPTION_NEW_ENCRYPTED_FILEERROR_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILEERROR_CS_ENCRYPTION_UNSUPPORTED_SERVERERROR_CS_ENCRYPTION_INVALID_SERVER_RESPONSEERROR_ENCRYPTION_POLICY_DENIES_OPERATIONERROR_EFS_VERSION_NOT_SUPPORTERROR_EFS_DISABLED

Source: Microsoft WinError.h

Last updated: