June 2015 Intel CPU microcode update for Windows

This article describes a microcode update for Intel Central Processing Units (CPUs). The update is for Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7 Service Pack 1 (SP1), or Windows Server 2008 R2 SP1. Before you install this update, see the Prerequisites section.

About this update

This update fixes several issues with Intel CPUs that could cause computer crashes or functions incorrectly. Also, this update improves the reliability of computers that uses certain Intel CPUs.

How to obtain this update

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

Method 1: Windows Update

This update is provided as an Important update on Windows Update. For more information about how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

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

Operating system

Update

All supported x86-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows 8.1

Download Download the package now.

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

All supported x86-based versions of Windows 8

Download Download the package now.

All supported x64-based versions of Windows 8

Download Download the package now.

All supported x64-based versions of Windows Server 2012

Download Download the package now.

All supported x86-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows 7

Download Download the package now.

All supported x64-based versions of Windows Server 2008 R2

Download Download the package now.

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

119591 How to obtain Microsoft support files from online services 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.

Update detail information

Prerequisites

To apply this update, 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. Or, install Service Pack 1 for Windows 7 or Windows Server 2008 R2.

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

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

Update replacement information

This update does not replace a previously released update.

The global version of this update 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

  • 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 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 for Windows 8.1 and for Windows Server 2012 R2" 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

Mcupdate_genuineintel.dll

6.3.9600.17826

554,328

12-May-2015

00:32

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

6.3.9600.17826

1,380,184

12-May-2015

00:24

x64

Hvix64.exe

6.3.9600.17826

1,423,192

12-May-2015

00:24

x64

Hvloader.efi

6.3.9600.17826

1,390,936

12-May-2015

00:24

Not applicable

Hvloader.exe

6.3.9600.17826

1,264,472

12-May-2015

00:24

x64

Hvservice.sys

6.3.9600.17826

68,952

12-May-2015

00:24

x64

Kdhvcom.dll

6.3.9600.17826

19,800

12-May-2015

00:24

x64

Mcupdate_genuineintel.dll

6.3.9600.17826

536,920

12-May-2015

00:24

x64

Windows 8 and Windows Server 2012 file information and notes

  • 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

    6.2.920 0.17xxx

    Windows 8 and Windows Server 2012

    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 for Windows 8 and for Windows Server 2012" 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

File name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.2.9200.17368

753,496

11-May-2015

21:00

x86

For all supported x64-based versions of Windows 8 or Windows Server 2012

File name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.2.9200.17368

527,704

11-May-2015

22:49

x64

Windows 7 and Windows Server 2008 R2 file information and notes

  • 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

    6.1.760 1.18xxx

    Windows 7 or Windows Server 2008 R2

    SP1

    GDR

  • 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 7 and for Windows Server 2008 R2" 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 7

File name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.1.7601.18848

715,200

09-May-2015

18:09

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Mcupdate_genuineintel.dll

6.1.7601.18848

493,504

09-May-2015

18:26

x64

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_dddc54458b2c51722765181ed72197fb_31bf3856ad364e35_6.3.9600.17826_none_9e43152854b8a191.manifest

File version

Not applicable

File size

717

Date (UTC)

12-May-2015

Time (UTC)

00:41

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.3.9600.17826_none_51a2a3bacdb479ee.manifest

File version

Not applicable

File size

2,572

Date (UTC)

12-May-2015

Time (UTC)

00:44

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_757e6ef79545caccaced19b0eb5f7c6c_31bf3856ad364e35_6.3.9600.17826_none_6220debb8f4f3858.manifest

File version

Not applicable

File size

710

Date (UTC)

12-May-2015

Time (UTC)

00:41

Platform

Not applicable

File name

Amd64_cbecde2bd81bc8506d5e9897540f9955_31bf3856ad364e35_6.3.9600.17826_none_6a92a6364577a6ec.manifest

File version

Not applicable

File size

721

Date (UTC)

12-May-2015

Time (UTC)

00:41

Platform

Not applicable

File name

Amd64_microsoft-hyper-v-drivers-hypervisor_31bf3856ad364e35_6.3.9600.17826_none_2152863e3949e497.manifest

File version

Not applicable

File size

6,493

Date (UTC)

12-May-2015

Time (UTC)

00:41

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.3.9600.17826_none_adc13f3e8611eb24.manifest

File version

Not applicable

File size

2,574

Date (UTC)

12-May-2015

Time (UTC)

00:41

Platform

Not applicable

Additional file information for Windows 8 and for Windows Server 2012

Additional files for all supported x86-based versions of Windows 8

File property

Value

File name

X86_8e7326cc6f925e54a0d84c990aa074fe_31bf3856ad364e35_6.2.9200.17368_none_cabfaf3ba05425a8.manifest

File version

Not applicable

File size

717

Date (UTC)

12-May-2015

Time (UTC)

07:23

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.2.9200.17368_none_b984a27a83a05a20.manifest

File version

Not applicable

File size

2,569

Date (UTC)

11-May-2015

Time (UTC)

21:03

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012

File property

Value

File name

Amd64_569274d89bfda5557b2fbb9005926f6d_31bf3856ad364e35_6.2.9200.17368_none_cc8f46c7d42a3931.manifest

File version

Not applicable

File size

721

Date (UTC)

12-May-2015

Time (UTC)

07:23

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.2.9200.17368_none_15a33dfe3bfdcb56.manifest

File version

Not applicable

File size

2,571

Date (UTC)

11-May-2015

Time (UTC)

22:56

Platform

Not applicable

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File property

Value

File name

X86_597b63a1349efdcd3b182e935833f222_31bf3856ad364e35_6.1.7601.18848_none_8b96a5ce9bc2c173.manifest

File version

Not applicable

File size

717

Date (UTC)

12-May-2015

Time (UTC)

14:27

Platform

Not applicable

File name

X86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.18848_none_beaaf69b10a43194.manifest

File version

Not applicable

File size

2,530

Date (UTC)

09-May-2015

Time (UTC)

18:32

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File property

Value

File name

Amd64_468c651ebe49ae50f4785ab7ae06d724_31bf3856ad364e35_6.1.7601.18848_none_7bf245856a1fa19b.manifest

File version

Not applicable

File size

721

Date (UTC)

12-May-2015

Time (UTC)

14:27

Platform

Not applicable

File name

Amd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.18848_none_1ac9921ec901a2ca.manifest

File version

Not applicable

File size

2,532

Date (UTC)

09-May-2015

Time (UTC)

18:49

Platform

Not applicable

References

Learn about the terminology that Microsoft uses to describe software updates.

Third-party information disclaimer

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.

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