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ERROR_INSUFFICIENT_POWER
What ERROR_INSUFFICIENT_POWER means
This code is typically returned by power-aware hardware or a driver when an operation would exceed the current power budget or cannot be supported in the present power state. It is not a CPU-performance message.
Where it commonly appears
- USB and peripheral initialization
- Battery-powered systems
- Docking stations and bus-powered hubs
- Device transitions from low-power states
Likely causes
- A bus-powered hub cannot supply the required current
- The system is on battery or in a restricted power mode
- A device or firmware reports an invalid power requirement
- Too many peripherals share the available budget
- A power-state transition is still in progress
Diagnostic checklist
- Identify the exact device, bus, power source, and current power state
- Test through a powered hub or direct port when appropriate
- Review device-manager and System event logs
- Update firmware and drivers only from trusted sources
- Check whether the failure disappears on external power
Guidance for developers
Expose the device and power condition to the user instead of retrying indefinitely. Defer optional operations until power is available and handle device arrival/removal races.
Guidance for administrators
Reduce the bus load, connect external power, verify the correct adapter, and inspect dock or hub capacity. Replacing cables can help only when they are part of the power path.
Example incident
A high-current USB device is connected through an unpowered hub already serving several peripherals. Enumeration reaches the driver’s power check and fails with this code. A powered hub or direct connection resolves it.
Related conditions
Do not confuse this with ERROR_NOT_ENOUGH_MEMORY or thermal throttling. The limiting resource is electrical power or the reported power budget.
Operational decision points
Engineering analysis should anchor this result in a device power budget condition and not merely a transient API failure. For ERROR_INSUFFICIENT_POWER, the deciding evidence is device identity, bus, hub, required current, power source, power state. Preserving this first-occurrence evidence is more useful than increasing retry frequency for investigation sequence 8.
- Impact boundary: identify the exact process, account, device, file, session, host, or connection affected by this result; do not assume the whole machine is in the same state.
- State change required: the next attempt is justified only after the relevant device power budget state can differ from the failed attempt.
- Partial outcome: verify whether the operation allocated resources, changed data, sent a request, or modified policy before this result was returned.
- Escalation evidence: preserve device identity, bus, hub, required current, power source, power state together with component version and the first preceding failure.
Concrete recovery example
Consider a case where a high-current peripheral was connected through an unpowered hub. Repeating the same call leaves the underlying condition unchanged and produces another this result. The durable response is to supply adequate power or defer the operation. Validation for it should use one controlled operation and inspect both the returned status and the resulting state associated with case 8.
Monitoring and validation
A monitoring rule for it should distinguish first occurrence from repetition, group events by affected object, and correlate them with deployments or configuration changes. The recovery is complete only when the expected device power budget state is present and consistent; absence of another log line by itself is not sufficient proof.
Retain the original this result event until validation for investigation case 8 is complete. After it is corrected, verify that no partial or stale artifact specific to remediation sequence 8 remains before declaring recovery complete. This it-specific verification prevents a hidden secondary problem from surviving after remediation step 8.
References
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