Introduction
This update fixes an issue that may cause a Windows 7 or Windows Server 2008 R2-based computer to crash. This issue occurs when a program that uses Windows Filtering Platform (such as an antivirus program) is running on the computer.
Resolution
Update information
How to obtain this update
Microsoft Update
This update is available from Windows Update.
Microsoft Download Center
The following files are available for download from the Microsoft Download Center:
| Operating system | Update |
|---|---|
| All supported x86-based versions of Windows 7 |
Download the update package now. |
| All supported x64-based versions of Windows 7 |
Download the update package now. |
| All supported x64-based versions of Windows Server 2008 R2 |
Download the update package now. |
| All supported IA-64-based versions of Windows Server 2008 R2 |
Download the update package now. |
For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to obtain Microsoft support files from online services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.
Prerequisites
To apply this hotfix, you must be running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1. For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2
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.
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 files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
Version Product Milestone Service branch 6.1.760
1.18xxxWindows 7 and Windows Server 2008 R2 SP1 GDR 6.1.760
1.22xxxWindows 7 and Windows Server 2008 R2 SP1 LDR GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. 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 name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Netio.sys | 6.1.7601.18327 | 240,576 | 26-Nov-2013 | 11:11 | x86 |
| Netio.sys | 6.1.7601.22525 | 240,576 | 26-Nov-2013 | 11:07 | x86 |
| Fwpkclnt.sys | 6.1.7601.18042 | 187,752 | 03-Jan-2013 | 05:04 | x86 |
| Tcpip.sys | 6.1.7601.18254 | 1,294,272 | 08-Sep-2013 | 02:07 | x86 |
| Fwpkclnt.sys | 6.1.7601.22525 | 187,840 | 26-Nov-2013 | 11:07 | x86 |
| Tcpip.sys | 6.1.7601.22525 | 1,309,632 | 26-Nov-2013 | 11:07 | x86 |
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Netio.sys | 6.1.7601.18327 | 376,768 | 26-Nov-2013 | 11:40 | x64 |
| Netio.sys | 6.1.7601.22525 | 376,768 | 26-Nov-2013 | 11:34 | x64 |
| Fwpkclnt.sys | 6.1.7601.18042 | 288,088 | 03-Jan-2013 | 06:00 | x64 |
| Tcpip.sys | 6.1.7601.18254 | 1,903,552 | 08-Sep-2013 | 02:30 | x64 |
| Fwpkclnt.sys | 6.1.7601.22525 | 288,192 | 26-Nov-2013 | 11:34 | x64 |
| Tcpip.sys | 6.1.7601.22525 | 1,897,408 | 26-Nov-2013 | 11:34 | x64 |
For all supported IA-64-based versions of Windows Server 2008 R2
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| Netio.sys | 6.1.7601.18327 | 711,104 | 26-Nov-2013 | 10:53 | IA-64 |
| Netio.sys | 6.1.7601.22525 | 711,104 | 26-Nov-2013 | 10:42 | IA-64 |
| Fwpkclnt.sys | 6.1.7601.18042 | 482,152 | 03-Jan-2013 | 04:45 | IA-64 |
| Tcpip.sys | 6.1.7601.18254 | 3,790,272 | 08-Sep-2013 | 01:35 | IA-64 |
| Fwpkclnt.sys | 6.1.7601.22525 | 482,752 | 26-Nov-2013 | 10:42 | IA-64 |
| Tcpip.sys | 6.1.7601.22525 | 3,806,656 | 26-Nov-2013 | 10:42 | IA-64 |
Status
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