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You receive a "Stop 0x0000007E" error on the first restart after you enable Hyper-V on a Windows Server 2008 R2-based computer

View products that this article applies to.

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Assume that you enable the Hyper-V role on a computer that is running Windows Server 2008 R2. You restart the computer after you enable the Hyper-V role. However, you receive the following Stop error message during the restart operation:
Stop 0x0000007E (ffffffffc0000096,
parameter2, parameter3,
  • The parameters in these Stop error messages may vary, depending on the actual configuration.
  • The symptoms of a Stop error may vary, depending on your computer's system failure options. For example, the computer may restart when a Stop error occurs.

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This problem occurs because the system uses a C-state that is supported by the processor. However, the C-stateis not supported by Hyper-V.

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To resolve this problem, follow these steps:
  1. Disable Processor Virtualization in the BIOS.
  2. Start the computer normally.
  3. Apply this hotfix and then restart the computer.
  4. Re-enable the Processor Virtualization in the BIOS.
  5. Enable Processor Virtualization in the BIOS to enable the Hyper-V role.

Hotfix information

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

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.


No prerequisites are required for Windows Server 2008-based computers.

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 Global 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 2008 R2, x64-based editions
File nameFile versionFile sizeDateTimePlatform
Ntkrnlpa.exe6.1.7600.205103,954,76020-Aug-200905:54Not Applicable
Ntoskrnl.exe6.1.7600.205103,899,48020-Aug-200905:54Not Applicable

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

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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

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Keywords: kb, kbmdd, kbhyperv, kbexpertiseinter, kbautohotfix, kbsurveynew, kbbug, kbfix, kbhotfixserver, kbqfe

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Article Info
Article ID : 974598
Revision : 1
Created on : 1/7/2017
Published on : 10/9/2014
Exists online : False
Views : 18