ERROR_DRIVER_FAILED_SLEEP

{System Standby Failed} The driver %hs does not support standby mode. Updating this driver may allow the system to go to standby mode.

Matched as: the code as given (hex)

Source: System Error Codes (500-999) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09