In Windows Vista, certain compatibility and reliability issues can affect many things on your computer. These include the video driver, graphics, and Windows Calendar. You can resolve these issues by downloading and installing the software update or service pack that is included in this article.

This article describes the service pack and the two versions of the software update and the issues that the software update resolves. The article also provides a direct link to the software update so that you can download it easily.

Service pack information:

You can install the latest service pack for Windows Vista from a link in this Microsoft Knowledge base article:

Software Update

The first version of this update is designed for 32-bit Windows Vista systems, also known as x86-based systems. 32-bit Windows Vista systems include most home computers and some business computers.

The second version is designed for 64-bit Windows Vista systems, also known as x64-based systems. These systems include many business computers. The main differences between the 32-bit and 64-bit versions of Windows Vista are that the 64-bit version requires more memory and offers more security and memory management options for people who need powerful application support.

This update does not replace any other updates.

Download information

To install the correct version of this update, you must know your Windows version. Additionally, you must be logged on to Windows as an administrator. If you are not sure which Windows version is installed, or if you need help verifying that you are an administrator, click here to verify your environment (http://support.microsoft.com/gp/admin) . Then, download the correct update by clicking one of the following links.

Restart requirement

You must restart your computer after you apply this update.

Update information

The following files are available for download from the Microsoft Download Center:

Update for Windows Vista for x86-based Systems

Download the 938194 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=AE2F819D-C33D-48DB-A7E3-62EEF7C1F7C2)

Update for Windows Vista for x64-based Systems

Download the 938194 package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=5B7F1544-FEF3-4C80-AF1A-8B732DCB2756)

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: 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.

If you have problems installing this update or if you still have problems after you have successfully installed this update, you will have to do some additional troubleshooting that is outside the scope of this article. If you are not comfortable with advanced troubleshooting, you might want to ask someone for help or contact Support. For information about how to contact Support, visit the following Microsoft Web site:

This update resolves the following issues:

• The screen goes blank when you try to upgrade the video driver. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  932539  (http://kbalertz.com/Feedback.aspx?kbNumber=932539/ ) The screen may go blank when you try to upgrade the video driver on a Windows Vista-based computer
• The computer stops responding, and you receive a "Display driver stopped responding and has recovered" error message. You can restart the computer only by pressing the computer's power button.
• The computer stops responding or restarts unexpectedly when you play video games or perform desktop operations.
• The Diagnostic Policy Service (DPS) stops responding when the computer is under heavy load or when very little memory is available. This problem prevents diagnostics from working.
• The screen goes blank after an external display device that is connected to the computer is turned off. For example, this problem may occur when a projector is turned off during a presentation.
• Some graphics processing units (GPUs) experience stability issues with Windows Vista. These issues could cause the GPUs to stop responding (hang).
• Visual appearance issues occur when you play graphics-intensive games.
• You experience poor playback quality when you play HD DVD disks or Blu-ray disks on a large monitor.
• Applications that load the Netcfgx.dll component exit unexpectedly.
• Windows Calendar exits unexpectedly after you create a new appointment, create a new task, and then restart the computer.
• Internet Connection Sharing stops responding after you upgrade a computer that is running Windows XP to Windows Vista and then restart the computer.
• The Printer Spooler service stops unexpectedly.
• You receive a "Stop 0x0000009F" error when you put the computer to sleep while a Point-to-Point Protocol (PPP) connection is active. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  931671  (http://kbalertz.com/Feedback.aspx?kbNumber=931671/ ) Error message when you put a Windows Vista-based computer to sleep while a PPP connection is active: "STOP 0x0000009F"

For more information about the difference between 32-bit versions of Windows Vista and 64-bit versions of Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the latest service pack for Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base: For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base: 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.

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.

Windows Vista, x86-based versions

Windows Vista, 64-bit versions