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.
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:
How do I find out whether I have Windows Vista SP1 installed?
Click
Start, right-click
Computer, and then click
Properties.
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?
Click
Start, right-click
Computer, and then click
Properties.
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.
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 (with a gigabit NIC connected to a gigabit switch/router) that has a NVIDIA network adapter nForce driver version 67.5.4.0 that is installed to a Windows Media Center Extender device.
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:
935791
(http://support.microsoft.com/kb/935791/
)
How to obtain the latest Windows Vista service pack
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.
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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