A reliability and performance update is available for Windows Vista SP1-based computers

Update information

An update is available that will help improve the performance and reliability of Windows Vista. If you are not sure whether Windows Vista Service Pack 1 (SP1) is installed, see the "How do I find out whether I have Windows Vista SP1 installed?" section.

To install the correct version of this update, you must know whether your Windows Vista platform type is 32-bit or 64-bit. If you are not sure which platform type is installed, see the "How do I find out whether I'm running a 32-bit or 64-bit version of Windows Vista?" section.

If you do have Windows Vista SP1 installed, and you know whether your Windows Vista platform is 32-bit or 64-bit, you can download the update by clicking one of the following links:

Windows Vista, 32-bit versions

Windows Vista, 64-bit versions

How do I find out whether I have Windows Vista SP1 installed?

1.	Click Start, right-click Computer, and then click Properties.
2.	A window is displayed where you can view basic information about your computer. If Windows Vista SP1 is installed, you see a reference to Service Pack 1 under the Windows edition section.

How do I find out whether I'm running a 32-bit or 64-bit version of Windows Vista?

1.	Click Start, right-click Computer, and then click Properties.
2.	A window is displayed where you can view basic information about your computer. In the System type information under the System section, you can see whether a 32-bit or 64-bit version of Windows Vista is listed.

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More information for advanced users and IT professionals

This update resolves issues that may affect some Windows Vista SP1-based computers. These issues have been reported by customers who use the Error Reporting service or Microsoft Customer Support Services.

This update improves the performance, responsiveness, and reliability of Windows Vista in various scenarios.

This update includes the following improvements on a Windows Vista SP1-based computer:

•	This update improves the stability of Windows Vista SP1-based computers by addressing some crashes that may occur when you try to check e-mail by using a POP3 e-mail client such as Windows Mail or Mozilla Thunderbird. The crashes may occur on a Windows Vista SP1-based computer in the following scenario: • Incoming POP3 and outgoing SMTP traffic monitoring is enabled. • Both a third-party antivirus application and an antispyware application are installed, such as the following applications: • ZoneAlarm Internet Security Suite by Check Point Software Technologies Ltd. • SpySweeper by Webroot Software, Inc.
•	This update improves the reliability of the Windows Vista SP1 based-computers by addressing some problems that occur when you delete user accounts by using the User Accounts item in Control Panel. When this problem occurs, the system may stop responding (hang).
•	This update improves the reliability of Windows Vista SP1-based computers that experience issues in which large applications cannot run after the computer is turned on for extended periods of time. For example, when you try to start Excel 2007 after the computer is turned on for extended periods of time, a user may receive an error message that resembles the following: EXCEL.EXE is not a valid Win32 application
•	This update improves the reliability of Windows Vista SP1-based computers by reducing the number of crashes that may be caused by the Apple QuickTime thumbnail preview in Windows Live Photo Gallery.
•	This update improves the performance of Windows Vista SP1-based computers by reducing audio and video (AV) stuttering. Such AV stuttering may occur when the audio or video component is streaming high definition content from a Windows Vista SP1-based computer that has a NVIDIA network adapter nForce driver version 67.5.4.0 that is installed to a Windows Media Center Extender device.

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Prerequisites

To install this update, you must have Windows Vista Service Pack 1 (SP1) installed.

For more information about Windows Vista Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

Restart information

You must restart the computer after you apply this update.

Replacement information

This update does not replace any Windows Vista updates or hotfixes.

File information

The English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Download information

Windows Vista, 32-bit versions

File name	File version	File size	Date	Time	Platform
Emdmgmt.dll	6.0.6001.18069	564,736	10-May-2008	03:35	x86
Emdperf.h	Not Applicable	924	18-Sep-2006	21:46	Not Applicable
Emdperf.ini	Not Applicable	5,100	18-Sep-2006	21:46	Not Applicable
Emdmgmt.dll	6.0.6001.22176	564,736	10-May-2008	03:17	x86
Emdperf.h	Not Applicable	924	18-Dec-2007	21:41	Not Applicable
Emdperf.ini	Not Applicable	5,100	18-Dec-2007	21:41	Not Applicable
Netio.sys	6.0.6001.22188	223,288	28-May-2008	03:27	x86
Bfe.dll	6.0.6001.22188	328,704	28-May-2008	03:17	x86
Fwpkclnt.sys	6.0.6001.22188	101,432	28-May-2008	03:28	x86
Fwpuclnt.dll	6.0.6001.22188	595,456	28-May-2008	03:19	x86
Ikeext.dll	6.0.6001.22188	438,272	28-May-2008	03:19	x86
Wfp.mof	Not Applicable	814	18-Dec-2007	21:11	Not Applicable
Wfp.tmf	Not Applicable	175,508	28-May-2008	01:19	Not Applicable
Ntkrnlpa.exe	6.0.6001.18063	3,600,952	26-Apr-2008	08:25	Not Applicable
Ntoskrnl.exe	6.0.6001.18063	3,549,240	26-Apr-2008	08:25	Not Applicable
Ntkrnlpa.exe	6.0.6001.22167	3,601,464	26-Apr-2008	08:11	Not Applicable
Ntoskrnl.exe	6.0.6001.22167	3,549,240	26-Apr-2008	08:11	Not Applicable
Pacer.sys	6.0.6001.18046	72,192	05-Apr-2008	01:21	x86
Pacercnt.h	Not Applicable	3,010	18-Sep-2006	21:37	Not Applicable
Pacerprf.dll	6.0.6001.18046	15,360	05-Apr-2008	03:34	x86
Pacerprf.ini	Not Applicable	13,750	18-Sep-2006	21:37	Not Applicable
Traffic.dll	6.0.6000.16386	33,280	02-Nov-2006	09:46	x86
Wshqos.dll	6.0.6000.16386	13,824	02-Nov-2006	09:46	x86
Pacer.sys	6.0.6001.22151	72,192	05-Apr-2008	01:20	x86
Pacercnt.h	Not Applicable	3,010	18-Dec-2007	21:09	Not Applicable
Pacerprf.dll	6.0.6001.22151	15,360	05-Apr-2008	03:20	x86
Pacerprf.ini	Not Applicable	13,750	18-Dec-2007	21:09	Not Applicable
Traffic.dll	6.0.6001.22151	33,280	05-Apr-2008	03:21	x86
Wshqos.dll	6.0.6001.22151	13,824	05-Apr-2008	03:21	x86
Rpcrt4.dll	6.0.6001.18051	784,896	12-Apr-2008	03:32	x86
Rpcrt4.dll	6.0.6001.22156	784,896	12-Apr-2008	03:16	x86
Tcpip.sys	6.0.6001.18063	891,448	26-Apr-2008	08:26	x86
Tcpip.sys	6.0.6001.22167	891,448	26-Apr-2008	08:08	x86

Windows Vista, 64-bit versions

File name	File version	File size	Date	Time	Platform
Emdmgmt.dll	6.0.6001.18069	399,360	10-May-2008	03:55	x64
Emdperf.h	Not Applicable	924	18-Sep-2006	21:44	Not Applicable
Emdperf.ini	Not Applicable	5,100	18-Sep-2006	21:44	Not Applicable
Emdmgmt.dll	6.0.6001.22176	399,360	10-May-2008	03:44	x64
Emdperf.h	Not Applicable	924	18-Dec-2007	21:41	Not Applicable
Emdperf.ini	Not Applicable	5,100	18-Dec-2007	21:41	Not Applicable
Netio.sys	6.0.6001.22188	347,192	28-May-2008	03:47	x64
Bfe.dll	6.0.6001.22188	458,240	28-May-2008	03:38	x64
Fwpkclnt.sys	6.0.6001.22188	168,504	28-May-2008	03:49	x64
Fwpuclnt.dll	6.0.6001.22188	779,776	28-May-2008	03:39	x64
Ikeext.dll	6.0.6001.22188	454,656	28-May-2008	03:40	x64
Wfp.mof	Not Applicable	814	18-Dec-2007	21:10	Not Applicable
Wfp.tmf	Not Applicable	174,680	28-May-2008	01:49	Not Applicable
Ntoskrnl.exe	6.0.6001.18063	4,694,584	26-Apr-2008	08:53	x64
Ntoskrnl.exe	6.0.6001.22167	4,694,584	26-Apr-2008	08:43	x64
Pacer.sys	6.0.6001.18046	94,208	05-Apr-2008	01:55	x64
Pacercnt.h	Not Applicable	3,010	18-Sep-2006	21:35	Not Applicable
Pacerprf.dll	6.0.6001.18046	17,920	05-Apr-2008	04:00	x64
Pacerprf.ini	Not Applicable	13,750	18-Sep-2006	21:35	Not Applicable
Traffic.dll	6.0.6001.18046	39,424	05-Apr-2008	04:00	x64
Wshqos.dll	6.0.6001.18046	16,896	05-Apr-2008	04:00	x64
Pacer.sys	6.0.6001.22151	94,208	05-Apr-2008	01:58	x64
Pacercnt.h	Not Applicable	3,010	18-Dec-2007	21:09	Not Applicable
Pacerprf.dll	6.0.6001.22151	17,920	06-Apr-2008	03:05	x64
Pacerprf.ini	Not Applicable	13,750	18-Dec-2007	21:09	Not Applicable
Traffic.dll	6.0.6001.22151	39,424	06-Apr-2008	03:06	x64
Wshqos.dll	6.0.6001.22151	16,896	06-Apr-2008	03:06	x64
Rpcrt4.dll	6.0.6001.18051	1,280,512	12-Apr-2008	03:58	x64
Rpcrt4.dll	6.0.6001.22156	1,319,936	12-Apr-2008	03:51	x64
Tcpip.sys	6.0.6001.18063	1,421,368	26-Apr-2008	08:55	x64
Tcpip.sys	6.0.6001.22167	1,421,368	26-Apr-2008	08:47	x64
Fwpuclnt.dll	6.0.6001.22188	595,456	28-May-2008	03:19	x86
Wfp.mof	Not Applicable	814	18-Dec-2007	21:11	Not Applicable
Pacerprf.dll	6.0.6001.18046	15,360	05-Apr-2008	03:34	x86
Traffic.dll	6.0.6001.18046	33,280	05-Apr-2008	03:34	x86
Wshqos.dll	6.0.6001.18046	13,824	05-Apr-2008	03:34	x86
Pacerprf.dll	6.0.6001.22151	15,360	05-Apr-2008	03:20	x86
Traffic.dll	6.0.6001.22151	33,280	05-Apr-2008	03:21	x86
Wshqos.dll	6.0.6001.22151	13,824	05-Apr-2008	03:21	x86
Rpcrt4.dll	6.0.6001.18051	677,376	12-Apr-2008	03:30	x86
Rpcrt4.dll	6.0.6001.22156	677,888	12-Apr-2008	03:17	x86

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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.

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