Stop error message in Windows 7 or Windows Server 2008 R2: "Stop error code 0x0000007E (SYSTEM_THREAD_EXCEPTION_NOT_HANDLED)" or "Stop error code 0x00000050 (PAGE_FAULT_IN_NONPAGED_AREA)"

Applies to: Windows 7 EnterpriseWindows 7 Home BasicWindows 7 Home Premium

Not sure if this is the right fix? We've added this issue to our memory dump diagnostic which can confirm.


On a computer that is running Windows 7 or Windows Server 2008 R2, you may receive one of the following Stop error messages:
Stop 0x0000007E (<parameter1>, <parameter2>, <parameter3>, <parameter 4>)

Stop 0x00000050 (<parameter1>, 0 or 1, <parameter 3>, 0)

This behavior occurs when you unload a USB video device or when you shutdown this computer.

  • The parameters in this error message vary, depending on the configuration of the computer.
  • Not all "0x0000007E" or "0x00000050" Stop errors are caused by this problem.


This issue occurs because of a race condition in the USB Video driver when a USB video device is unloaded.


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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

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, contact 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 Web site: 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 7 or Windows Server 2008 R2.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Usbvideo.sys6.1.7600.16543146,30404-Mar-201004:04Not Applicable
Usbvideo.sys6.1.7600.20659146,30404-Mar-201004:01Not Applicable
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform


To work around this issue, disable all USB Video Class compliant devices.


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

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

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
File nameFile versionFile sizeDateTimePlatform
Package_for_kb979538_rtm_bf~31bf3856ad364e35~x86~~ Applicable2,37204-Mar-201011:56Not Applicable
Package_for_kb979538_rtm~31bf3856ad364e35~x86~~ Applicable2,42304-Mar-201011:56Not Applicable
Update-bf.mumNot Applicable1,84604-Mar-201011:56Not Applicable
X86_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.16543_none_57805b62f719089a.manifestNot Applicable2,60904-Mar-201008:08Not Applicable
X86_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.20659_none_580529fe10395c5f.manifestNot Applicable2,60904-Mar-201008:00Not Applicable
X86_usbvideo.inf_31bf3856ad364e35_6.1.7600.16543_none_2dfb89901bc8b78d.manifestNot Applicable2,09304-Mar-201008:06Not Applicable
X86_usbvideo.inf_31bf3856ad364e35_6.1.7600.20659_none_2e80582b34e90b52.manifestNot Applicable2,09304-Mar-201007:58Not Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.16543_none_b39ef6e6af7679d0.manifestNot Applicable2,61104-Mar-201009:16Not Applicable
Amd64_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.20659_none_b423c581c896cd95.manifestNot Applicable2,61104-Mar-201008:58Not Applicable
Amd64_usbvideo.inf_31bf3856ad364e35_6.1.7600.16543_none_8a1a2513d42628c3.manifestNot Applicable2,09704-Mar-201009:14Not Applicable
Amd64_usbvideo.inf_31bf3856ad364e35_6.1.7600.20659_none_8a9ef3aeed467c88.manifestNot Applicable2,09704-Mar-201008:54Not Applicable
Package_for_kb979538_rtm_bf~31bf3856ad364e35~amd64~~ Applicable2,80604-Mar-201011:56Not Applicable
Package_for_kb979538_rtm~31bf3856ad364e35~amd64~~ Applicable2,86504-Mar-201011:56Not Applicable
Update-bf.mumNot Applicable2,27604-Mar-201011:56Not Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Ia64_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.16543_none_5781ff58f7171196.manifestNot Applicable2,61004-Mar-201009:07Not Applicable
Ia64_microsoft-windows-kernelstreaming_31bf3856ad364e35_6.1.7600.20659_none_5806cdf41037655b.manifestNot Applicable2,61004-Mar-201008:56Not Applicable
Package_for_kb979538_rtm_bf~31bf3856ad364e35~ia64~~ Applicable1,66004-Mar-201011:56Not Applicable
Package_for_kb979538_rtm~31bf3856ad364e35~ia64~~ Applicable1,68304-Mar-201011:55Not Applicable
Update-bf.mumNot Applicable1,65804-Mar-201011:56Not Applicable