- You have a computer that is running Windows 8, Windows Server 2012, Windows 7 Service Pack 1 (SP1), or Windows Server 2008 R2 SP1.
- The computer uses the Windows Filtering Platform (WFP), or a WFP-based antivirus product is installed on the computer.
- A user application tries to establish a network connection.
You have a WFP provider with multiple callouts or two WFP providers with one or more callouts, and these callouts are registered at the Application Layer Enforcement (ALE) connect layer. When a user application tries to establish a network connection, the callouts are triggered. The first callout pends the connection and then completes the request. Then, a reauthorization of the connection is triggered. The second callout pends the reauthorization of the connection and then completes the request. However, the WFP never decreases the required reference count in the reauthorization path. Therefore, the network connection stalls.
Hotfix informationA 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 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.
PrerequisitesTo apply this hotfix, you must be running one of the following operating systems:
- Windows 8
- Windows Server 2012
- Windows 7 SP1
- Windows Server 2008 R2 SP1
Registry informationTo apply this hotfix, you do not have to make any changes to the registry.
Restart requirementYou must restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace a previously released hotfix.
Article ID: 2885976 - Last Review: Oct 21, 2013 - Revision: 1