What does Windows error code 783 (ERROR_SYSTEM_POWERSTATE_COMPLEX_TRANSITION) mean?

ERROR_SYSTEM_POWERSTATE_COMPLEX_TRANSITION

the system is in a power transition whose final state may change.

ERROR_SYSTEM_POWERSTATE_COMPLEX_TRANSITION indicates this condition: Unlike a simple transition with one known destination, this status records a complex path in which Windows is moving from one power state toward another but may enter an alternate state. Firmware, user action, wake events, or policy can alter the final route.

Where the result appears

• hybrid sleep and hibernation sequences.
• resume paths that immediately return to a low-power state.
• platform power flows involving modern standby or firmware-directed transitions.
• driver logs captured while the power manager reevaluates the target state.

What to collect

• all source, intermediate, proposed, and alternate power states.
• wake-source and sleep-reason data from the system log.
• device power callbacks and outstanding requests at each transition phase.
• BIOS, chipset, and power-management driver versions.

Handling and recovery

Code must treat the system as unstable until the final resume or suspend callback is delivered. Avoid assuming that an observed intermediate state guarantees the next callback. Queue work behind the power framework and make cleanup idempotent so an alternate route does not double-release resources.

Common misinterpretation

The word “complex” does not mean the system is corrupted. It describes a multi-stage transition with more than one possible destination.

References

• Microsoft: System error codes 500–999