stop 0x9f driver power state failure windows 7

Stop 0x9F: Driver Power State Failure in Windows 7

When a computer running Windows 7 encounters a critical error that prevents it from booting properly, it may display a blue screen of death (BSoD) with a stop code 0x9F. This error is known as 'Driver Power State Failure' and occurs when a driver fails to complete a power IRP within a specific time.

Understanding the Cause of Stop 0x9F

A power IRP, or I/O Request Packet, is a type of request that is used by device drivers to communicate with hardware devices. When a driver fails to complete a power IRP, it can cause the operating system to become unstable and eventually crash.

The stop code 0x9F indicates that there was an issue with a device object or a physical device object in the system's device stack. The !analyze command in WinDbg can be used to display more information about this error, including the device object that caused it.

Analyzing Stop 0x9F

To analyze stop code 0x9F using WinDbg, you can use the following command:

!analyze -show 0x9f 0x3

This command will display information about the bug check code, including the device object that caused it. The output will include details such as the IRP type and the device object name.

Resolving Stop 0x9F

Resolving stop code 0x9F requires troubleshooting the issue with the device driver or hardware component that is causing the problem. Here are some steps you can follow to resolve this error:

1. Check the system event logs for any errors related to the device driver or hardware component.

2. Update the device driver to the latest version.

3. Disable any unnecessary devices in the Device Manager.

4. Run a System File Checker (SFC) scan to check for corrupted system files.

5. If none of the above steps resolve the issue, you may need to reinstall the operating system or seek assistance from a professional.

Stop code 0x9F is a critical error that can occur in Windows 7 when a driver fails to complete a power IRP within a specific time. Analyzing this error using WinDbg can provide valuable information about the device object that caused it, which can help you troubleshoot and resolve the issue. By following the steps outlined above, you should be able to resolve stop code 0x9F and get your system up and running again.

Stop 0x9f driver power state failure windows 7