| Previous | Next |
| ERROR_REPARSE_OBJECT | ERROR_TRANSLATION_COMPLETE |
ERROR_RESOURCE_REQUIREMENTS_CHANGED
a device changed its resource requirements after a successful query-stop sequence.
ERROR_RESOURCE_REQUIREMENTS_CHANGED identifies this condition: Plug and Play uses this status when a device reports new requirements after the system has prepared it to stop. The change can affect interrupt, memory, I/O-port, DMA, or connection resources and requires the PnP manager to reconsider allocation.
Where the result appears
- device rebalancing.
- dock, hot-plug, and firmware-driven topology changes.
- drivers that alter operating modes during query-stop.
- resume paths where hardware capabilities differ from the earlier state.
What to collect
- device instance ID and driver versions.
- old and new resource-requirements lists.
- PnP event sequence and problem code.
- firmware, BIOS, ACPI, and bus-enumerator logs.
Handling and recovery
A function driver should report accurate requirements and tolerate the subsequent stop/start or rebalance sequence. Administrators should update firmware and drivers when resource changes repeatedly fail, but should not manually force arbitrary IRQ or memory assignments unless vendor guidance explicitly requires it.
Common misinterpretation
This code says the requirements changed, not that Windows has already failed to allocate them. The final start result and Device Manager problem code determine whether there is an actual outage.
References
Looking for a different code? Search another status or error code.