This article describes an issue that occurs on a Unified Extensible Firmware Interface (UEFI)-based computer that is running Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2. A hotfix is available to resolve this issue. The hotfix has a prerequisite.

Symptoms

This issue occurs if the following conditions are true:

  • The virtualization feature is enabled, and the Hyper-V role is installed on the UEFI-based computer.

  • The computer crashes, or you force a shutdown.

Note After two consecutive failed attempts to start Windows, the computer will go to Windows Recovery Environment (Windows RE) if it is enabled. By default, Windows RE is enabled.

Hotfix information

Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.

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 this specific problem.

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, submit a request to 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 website:

http://support.microsoft.com/contactus/?ws=supportNote 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 have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows 8.1 or Windows Server 2012 R2.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

The global 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 8.1 and Windows Server 2012 R2 file information and notes

Important Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1/Windows Server 2012 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.17xxx

    Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very 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 x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

Platform

Winload.efi

6.3.9600.17904

1,387,912

13-Jun-2015

02:34

Not applicable

Winload.exe

6.3.9600.17904

1,277,880

13-Jun-2015

02:34

x86

Winload.efi

6.3.9600.17904

1,387,912

13-Jun-2015

02:34

Not applicable

Winload.exe

6.3.9600.17904

1,277,880

13-Jun-2015

02:34

x86

Winresume.efi

6.3.9600.17904

1,267,536

13-Jun-2015

02:34

Not applicable

Winresume.exe

6.3.9600.17904

1,168,912

13-Jun-2015

02:34

x86

For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Hvax64.exe

6.3.9600.17904

1,380,184

13-Jun-2015

02:27

x64

Hvix64.exe

6.3.9600.17904

1,423,192

13-Jun-2015

02:27

x64

Hvloader.efi

6.3.9600.17904

1,390,936

13-Jun-2015

02:27

Not applicable

Hvloader.exe

6.3.9600.17904

1,264,472

13-Jun-2015

02:27

x64

Hvservice.sys

6.3.9600.17904

68,952

13-Jun-2015

02:27

x64

Kdhvcom.dll

6.3.9600.17904

19,800

13-Jun-2015

02:27

x64

Winload.efi

6.3.9600.17904

1,658,024

13-Jun-2015

02:28

Not applicable

Winload.exe

6.3.9600.17904

1,519,584

13-Jun-2015

02:28

x64

Winload.efi

6.3.9600.17904

1,658,024

13-Jun-2015

02:28

Not applicable

Winload.exe

6.3.9600.17904

1,519,584

13-Jun-2015

02:28

x64

Winresume.efi

6.3.9600.17904

1,486,496

13-Jun-2015

02:28

Not applicable

Winresume.exe

6.3.9600.17904

1,355,840

13-Jun-2015

02:28

x64

For all supported Windows RT 8.1

File name

File version

File size

Date

Time

Platform

Winload.efi

6.3.9600.17904

778,888

13-Jun-2015

02:40

Not applicable

Winload.efi

6.3.9600.17904

778,888

13-Jun-2015

02:40

Not applicable

Additional file information

Additional file information for Windows 8.1 and for Windows Server 2012 R2

Additional files for all supported x86-based versions of Windows 8.1

File property

Value

File name

X86_eebd06def4d07f6e4784fa08e3b8c5a9_31bf3856ad364e35_6.3.9600.17904_none_02002521167e71a7.manifest

File version

Not applicable

File size

718

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

X86_f613bff3b1ce0fccd4b37a245012b994_31bf3856ad364e35_6.3.9600.17904_none_08c96a7b028058f9.manifest

File version

Not applicable

File size

713

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

X86_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.3.9600.17904_none_e4e1dede17574cd1.manifest

File version

Not applicable

File size

2,999

Date (UTC)

13-Jun-2015

Time (UTC)

03:02

Platform

Not applicable

File name

X86_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.3.9600.17904_none_f01cf2b587ff9e89.manifest

File version

Not applicable

File size

5,807

Date (UTC)

13-Jun-2015

Time (UTC)

03:02

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2

File property

Value

File name

Amd64_5dfecbb3394247bed835df2eed40d6a6_31bf3856ad364e35_6.3.9600.17904_none_95716bf0dc526b41.manifest

File version

Not applicable

File size

722

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Amd64_eef6721f60ac251c6b5e476d5de633e5_31bf3856ad364e35_6.3.9600.17904_none_3a4baaa37942aec0.manifest

File version

Not applicable

File size

710

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Amd64_f7c200cbb16101a8f36ec3ae53be148e_31bf3856ad364e35_6.3.9600.17904_none_fb13e01b63b9254e.manifest

File version

Not applicable

File size

717

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Amd64_microsoft-hyper-v-drivers-hypervisor_31bf3856ad364e35_6.3.9600.17904_none_21662768393b772e.manifest

File version

Not applicable

File size

6,493

Date (UTC)

13-Jun-2015

Time (UTC)

03:06

Platform

Not applicable

File name

Amd64_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.3.9600.17904_none_41007a61cfb4be07.manifest

File version

Not applicable

File size

3,003

Date (UTC)

13-Jun-2015

Time (UTC)

03:06

Platform

Not applicable

File name

Amd64_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.3.9600.17904_none_4c3b8e39405d0fbf.manifest

File version

Not applicable

File size

5,813

Date (UTC)

13-Jun-2015

Time (UTC)

03:06

Platform

Not applicable

Additional files for all supported Windows RT 8.1

File property

Value

File name

Arm_902b29c4abf0a0b4bbeace782fa4086d_31bf3856ad364e35_6.3.9600.17904_none_4e336e4c0ec27a3f.manifest

File version

Not applicable

File size

713

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Arm_9c0d66eda20066ef6e361de87e1c072d_31bf3856ad364e35_6.3.9600.17904_none_7a26652b275c67c8.manifest

File version

Not applicable

File size

718

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Arm_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_6.3.9600.17904_none_e4e4513617546b97.manifest

File version

Not applicable

File size

2,231

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

File name

Arm_microsoft-windows-b..vironment-os-loader_31bf3856ad364e35_6.3.9600.17904_none_f01f650d87fcbd4f.manifest

File version

Not applicable

File size

3,542

Date (UTC)

13-Jun-2015

Time (UTC)

02:58

Platform

Not applicable

Status

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

More Information

For detailed information about Windows RE, see Windows Recovery Environment (Windows RE) Overview.

References

See the terminology that Microsoft uses to describe software updates.

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