Microsoft KB Archive/943899

= An update that improves the performance, responsiveness, and reliability of Windows Vista is available =

Article ID: 943899

Article Last Modified on 12/28/2007

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APPLIES TO


 * Windows Vista Ultimate
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Enterprise
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition

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

This update improves performance, responsiveness, and reliability of Windows Vista in various scenarios. This update resolves the following issues on a Windows Vista-based computer:
 * You receive a &quot;Stop 0x000000A0&quot; error when you try to switch the computer to the hibernate state.
 * You receive a &quot;Stop 0x0000009f&quot; error when you switch the computer to the hibernate state or to the standby state. Or, you receive this Stop error when you resume the computer from the hibernate state or from the standby state. This problem occurs on a computer that has a wireless network connection.
 * The disk does not spin down after a specified time of inactivity.

Additionally, this update can help improve performance when you perform operations that are related to large disk I/O. After you apply this update, you may notice up to a 15 percent performance improvement in some copying operations and when moving some large files.



How to obtain this update
This update is available for download from the Microsoft Download Center.

Update for Windows Vista, 32-bit versions
Download the Update for Windows Vista package now.

Update for Windows Vista, 64-bit versions
Download the Update for Windows Vista for x64-based Systems 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
No prerequisites are required.

Restart requirement
You must restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix 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.

Known issues
Some users may experience a known issue after they manually apply this update from the Microsoft Download Center. In this issue, users may be unable to use Windows Explorer to eject removable media. However, only some users may experience this problem. To resolve this known issue, apply hotfix 941673. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

941673 After you add the CopyFileBufferedSynchronousIo registry entry in Windows Vista, a file copies only slightly more quickly when you use Windows Explorer to copy the file to another computer



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

Keywords: kbexpertisebeginner kbwinvistapostrtmfix kbexpertiseinter kbqfe KB943899

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