790 is a storage and volume result. Microsoft’s system-code table describes this value as: “{Delayed Write Failed} Windows was unable to save all the data for the file %hs; the data has been lost. This error may be caused if the device has been removed or the media is write-protected.”
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: “{Delayed Write Failed} Windows was unable to save all the data for the file %hs; the data has been lost. This error may be caused if the device has been removed or the media is write-protected.”
ERROR_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR 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 | 790 |
|---|---|
| Hex form | 0x316 |
| Symbol | ERROR_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR |
| Windows family | Win32 system codes |
| Source level | Microsoft code and symbol entry |
This is a system message template. The reporting program may substitute a file name, path, device or other value for its placeholders.
Safe next steps
- For 790 (ERROR_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR), check whether the drive is detected and whether important files are backed up. Record any repeated I/O errors or disappearing device.
- Use the drive or PC maker’s official diagnostics for the exact model before attempting write-heavy file-system repair.
- Stop repeated scans, resets, or reinstalls if the drive is unstable or needed files have no backup.
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.
Stop repeated write-heavy scans or repairs if the drive drops offline or important data is not backed up.
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.