ERROR_INTERRUPT_STILL_CONNECTED - 764 (0x2FC)
The specified interrupt vector is still connected.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_INTERRUPT_STILL_CONNECTED error indicates that a specified interrupt vector is still in use or connected to some device or driver. This implies that the system attempted to disconnect an interrupt vector but failed because it was already associated with another component.
Error Details
This error typically occurs during operations involving interrupt vectors, such as configuring or managing device drivers and hardware interfaces. The error suggests that there is a conflict in resource management where the intended operation could not proceed due to existing connections.
Usage Context
The context of this error can vary depending on the specific operation being performed. It might arise when attempting to remove a driver, configure interrupt settings, or manage device resources within the Windows operating system environment.
Developer Interpretation
Developers should interpret this error as an indication that the intended operation could not be completed due to existing connections or dependencies. This may require further investigation into the current state of the system and the specific components involved in the operation.
Related Errors
ERROR_DEVICE_NOT_CONNECTED(0x21D): Indicates a device is not connected when expected.ERROR_INVALID_PARAMETER(0x57): Suggests that one or more parameters passed to an API call were invalid, which could be related if the interrupt vector was incorrectly specified.
FAQ
Q: What does ERROR_INTERRUPT_STILL_CONNECTED mean?
A: It means a specified interrupt vector is still connected and cannot be disconnected as intended. This typically occurs during device driver or hardware configuration operations.
Q: How can I resolve this error?
A: Review the current state of devices and drivers, ensure all connections are correct, and retry the operation if necessary.
Summary
The ERROR_INTERRUPT_STILL_CONNECTED error is a specific technical issue indicating that an interrupt vector cannot be disconnected due to existing connections. Developers should carefully manage device configurations and ensure proper resource handling to avoid such errors.