A computer that is running the x64 edition of Windows Server 2003 or of Windows XP stops responding after you install the 914784 update and a product that uses hardware-assisted virtualization

Consider the following scenario:

• You have a computer that is running the x64 edition of Microsoft Windows Server 2003 or of Microsoft Windows XP.
• The computer has AMD hardware-assisted virtualization support.
• You apply the 914784 update for kernel patch protection.
• You install a product that supports hardware-assisted virtualization (such as Microsoft Virtual Server 2005 R2 Service Pack 1 [SP1] - Beta 2).

In this scenario, the computer stops responding (hangs).

Update information

The following file is available for download from the Microsoft Download Center:

Download the Windows hotfix for computers that have AMD hardware-assisted virtualization support (AMD-V) package now. (http://www.microsoft.com/downloads/details.aspx?FamilyId=CEA2832E-7CFE-4A6A-A8E2-9F666AEC5BC0&displaylang=en)

Release Date: February 5, 2007

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.

Prerequisites

No prerequisites are required.

Restart requirement

You have to 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.

Windows Server 2003 and Windows XP, x64 editions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Technical support for x64-based versions of Microsoft Windows

Your hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site: For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site: 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.