The computer stops responding at startup in Windows Server 2008 R2 if you enable the Hyper-V role and if you have more than 512 GB of RAM

Symptoms

Consider the following scenario:
  • You have a computer that is running Windows Server 2008 R2.
  • The computer has more than 512 gigabytes (GB) of random access memory (RAM).
  • You enable the Hyper-V role.
In this scenario, the computer stops responding in the startup process.

Cause

This issue occurs because of a known issue in the hypervisor launch driver (Hvboot.sys).

Resolution

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running Windows Server 2008 R2 and have the Hyper-V role installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
Important
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Hvax64.exe6.1.7600.20733643,58414-Jun-201003:37x64
Hvboot.sys6.1.7600.20733118,66414-Jun-201006:39x64
Hvix64.exe6.1.7600.20733707,07214-Jun-201003:37x64

Status

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

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

Additional file information

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
File nameAmd64_9b28bda9363977999150d5c1046d1dde_31bf3856ad364e35_6.1.7600.20733_none_a17dbe18b852805e.manifest
File versionNot applicable
File size710
Date (UTC)15-Jun-2010
Time (UTC)16:12
PlatformNot applicable
File nameAmd64_microsoft-hyper-v-drivers-hypervisor_31bf3856ad364e35_6.1.7600.20733_none_8d03f68d982d273a.manifest
File versionNot applicable
File size4,163
Date (UTC)14-Jun-2010
Time (UTC)09:46
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,462
Date (UTC)15-Jun-2010
Time (UTC)16:12
PlatformNot applicable
Propriedades

ID do Artigo: 2133637 - Última Revisão: 22/11/2010 - Revisão: 1

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