"0x0000009F" Stop error when a website turns on a webcam in Windows 8

Applies to: Windows 8Windows 8 EnterpriseWindows 8 Pro


Consider the following scenario:
  • You have a webcam attached to a computer that is running Windows 8.
  • You run the default camera application from the Start screen.
  • You browse a website that tries to turn on the webcam that is being accessed by the default camera application. For example, you browse to YouTube and try to capture video directly from the site.
In this scenario, the computer freezes and may crash. If the computer crashes, you receive a stop errormessage that resembles the following:
STOP 0x0000009F (Parameter1, Parameter2, Parameter3, Parameter4)

  • This Stop error describes a DRIVER_POWER_STATE_FAILURE issue.
  • The parameters in this Stop error message vary, depending on the configuration of the computer.
  • Not all "0x0000009F" Stop errors are caused by this issue.
  • This issue does not occur if you do not run the default camera app when a website tries to access the webcam.


This issue occurs because of the way the device and Windows manage the device power state when there are multiple access requests.


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this hotfix, you must be running Windows 8.

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.


To work around this issue, close the default camera application before you allow a website to access the webcam.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates