4440 is a configuration or argument result. Microsoft’s system-code table describes this value as: “The copy offload read operation is not supported by a filter.”
Code reference and safe checks
Read the exact screen and operation before selecting a repair. This page does not run commands or collect files, keys or logs.
What this value means
Microsoft’s system-code table describes this value as: “The copy offload read operation is not supported by a filter.”
ERROR_OFFLOAD_READ_FLT_NOT_SUPPORTED is a Win32 system result, usually returned to an application or API caller. It is not a Windows blue-screen code or a diagnosis of the whole PC.
| Code | 4440 |
|---|---|
| Hex form | 0x1158 |
| Symbol | ERROR_OFFLOAD_READ_FLT_NOT_SUPPORTED |
| Windows family | Win32 system codes |
| Source level | Microsoft code and symbol entry |
Safe next steps
- For 4440 (ERROR_OFFLOAD_READ_FLT_NOT_SUPPORTED), record the exact option, parameter, object, or state mentioned by the message and the application that supplied it.
- Compare that value with the app vendor’s documented requirements. A generic registry edit or security bypass is not justified by the number alone.
- If it is an API return value, the developer should inspect the failing call and nearby logs.
After one step, repeat the original operation and record whether this same code returns. A different code needs a fresh interpretation.
What this code cannot prove
The source establishes the identifier and reference meaning. It does not establish the cause on your specific PC.
If the result differs from the documented message or a repair could remove data, stop and use the official source or vendor support.
Official reference and verification
Source type: Microsoft code and symbol entry. Checked against the source set on Nov 2, 2026.
The reference gives the meaning of this identifier. It does not inspect your PC or guarantee that one repair will work.