Computer is disconnected from the network or crashes when two callouts are registered in Windows 8 or Windows Server 2012

Applies to: Windows 8Windows 8 ProWindows 8 Enterprise


Consider the following scenarios:

  • You have a computer that is running Windows 8 or Windows Server 2012.
  • You install a program (for example, antivirus software) that calls a driver by using two callouts. Or, you install two programs that each call a driver by using one callout.
  • Two callouts are registered at the FWPM_LAYER_INBOUND_MAC_FRAME_ETHERNET layer.
  • One of the callouts is in a pending status to inspect incoming data packets.

In this situation, the computer is disconnected from the network or crashes. 


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that 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 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 or Windows Server 2012.

Registry information

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

Restart requirement

You might have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.


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