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 systemUpdate
All supported x86-based versions of Windows 8.1DownloadDownload the package now.
All supported x64-based versions of Windows 8.1 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012 R2DownloadDownload the package now.
All supported x86-based versions of Windows 8DownloadDownload the package now.
All supported x64-based versions of Windows 8 DownloadDownload the package now.
All supported x64-based versions of Windows Server 2012DownloadDownload the package now.
All supported x86-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows 7DownloadDownload the package now.
All supported x64-based versions of Windows Server 2008 R2DownloadDownload 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.

File information

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:
    VersionProductMilestoneService branch
    6.3.960 0.17xxxWindows 8.1 and Windows Server 2012 R2RTMGDR
  • 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 nameFile versionFile sizeDateTimePlatform
Mcupdate_genuineintel.dll6.3.9600.17826554,32812-May-201500:32x86
For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
File nameFile versionFile sizeDateTimePlatform
Hvax64.exe6.3.9600.178261,380,18412-May-201500:24x64
Hvix64.exe6.3.9600.178261,423,19212-May-201500:24x64
Hvloader.efi6.3.9600.178261,390,93612-May-201500:24Not applicable
Hvloader.exe6.3.9600.178261,264,47212-May-201500:24x64
Hvservice.sys6.3.9600.1782668,95212-May-201500:24x64
Kdhvcom.dll6.3.9600.1782619,80012-May-201500:24x64
Mcupdate_genuineintel.dll6.3.9600.17826536,92012-May-201500:24x64

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 0.17xxxWindows 8 and Windows Server 2012RTMGDR
  • 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 nameFile versionFile sizeDateTimePlatform
Mcupdate_genuineintel.dll6.2.9200.17368753,49611-May-201521:00x86
For all supported x64-based versions of Windows 8 or Windows Server 2012
File nameFile versionFile sizeDateTimePlatform
Mcupdate_genuineintel.dll6.2.9200.17368527,70411-May-201522:49x64

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 1.18xxxWindows 7 or Windows Server 2008 R2 SP1GDR
  • 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 nameFile versionFile sizeDateTimePlatform
Mcupdate_genuineintel.dll6.1.7601.18848715,20009-May-201518:09x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Mcupdate_genuineintel.dll6.1.7601.18848493,50409-May-201518:26x64

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 propertyValue
File nameX86_dddc54458b2c51722765181ed72197fb_31bf3856ad364e35_6.3.9600.17826_none_9e43152854b8a191.manifest
File versionNot applicable
File size717
Date (UTC)12-May-2015
Time (UTC)00:41
PlatformNot applicable
File nameX86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.3.9600.17826_none_51a2a3bacdb479ee.manifest
File versionNot applicable
File size2,572
Date (UTC)12-May-2015
Time (UTC)00:44
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
File propertyValue
File nameAmd64_757e6ef79545caccaced19b0eb5f7c6c_31bf3856ad364e35_6.3.9600.17826_none_6220debb8f4f3858.manifest
File versionNot applicable
File size710
Date (UTC)12-May-2015
Time (UTC)00:41
PlatformNot applicable
File nameAmd64_cbecde2bd81bc8506d5e9897540f9955_31bf3856ad364e35_6.3.9600.17826_none_6a92a6364577a6ec.manifest
File versionNot applicable
File size721
Date (UTC)12-May-2015
Time (UTC)00:41
PlatformNot applicable
File nameAmd64_microsoft-hyper-v-drivers-hypervisor_31bf3856ad364e35_6.3.9600.17826_none_2152863e3949e497.manifest
File versionNot applicable
File size6,493
Date (UTC)12-May-2015
Time (UTC)00:41
PlatformNot applicable
File nameAmd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.3.9600.17826_none_adc13f3e8611eb24.manifest
File versionNot applicable
File size2,574
Date (UTC)12-May-2015
Time (UTC)00:41
PlatformNot applicable
Additional file information for Windows 8 and for Windows Server 2012
Additional files for all supported x86-based versions of Windows 8
File propertyValue
File nameX86_8e7326cc6f925e54a0d84c990aa074fe_31bf3856ad364e35_6.2.9200.17368_none_cabfaf3ba05425a8.manifest
File versionNot applicable
File size717
Date (UTC)12-May-2015
Time (UTC)07:23
PlatformNot applicable
File nameX86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.2.9200.17368_none_b984a27a83a05a20.manifest
File versionNot applicable
File size2,569
Date (UTC)11-May-2015
Time (UTC)21:03
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 8 and of Windows Server 2012
File propertyValue
File nameAmd64_569274d89bfda5557b2fbb9005926f6d_31bf3856ad364e35_6.2.9200.17368_none_cc8f46c7d42a3931.manifest
File versionNot applicable
File size721
Date (UTC)12-May-2015
Time (UTC)07:23
PlatformNot applicable
File nameAmd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.2.9200.17368_none_15a33dfe3bfdcb56.manifest
File versionNot applicable
File size2,571
Date (UTC)11-May-2015
Time (UTC)22:56
PlatformNot 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 propertyValue
File nameX86_597b63a1349efdcd3b182e935833f222_31bf3856ad364e35_6.1.7601.18848_none_8b96a5ce9bc2c173.manifest
File versionNot applicable
File size717
Date (UTC)12-May-2015
Time (UTC)14:27
PlatformNot applicable
File nameX86_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.18848_none_beaaf69b10a43194.manifest
File versionNot applicable
File size2,530
Date (UTC)09-May-2015
Time (UTC)18:32
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
File propertyValue
File nameAmd64_468c651ebe49ae50f4785ab7ae06d724_31bf3856ad364e35_6.1.7601.18848_none_7bf245856a1fa19b.manifest
File versionNot applicable
File size721
Date (UTC)12-May-2015
Time (UTC)14:27
PlatformNot applicable
File nameAmd64_microsoft-windows-m..update-genuineintel_31bf3856ad364e35_6.1.7601.18848_none_1ac9921ec901a2ca.manifest
File versionNot applicable
File size2,532
Date (UTC)09-May-2015
Time (UTC)18:49
PlatformNot 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.
Properties

Article ID: 3064209 - Last Review: 07/14/2015 18:13:00 - Revision: 4.0

Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation, Windows 8 Enterprise, Windows 8 Pro, Windows 8, Windows Server 2008 R2 Service Pack 1, Windows 7 Service Pack 1

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