Article ID: 2903025 - View products that this article applies to.
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Symptoms

Consider the following scenario:
  • You have a computer that's running Windows 8.1, Windows Server 2012 R2, Windows 8, Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 SP1.
  • You have antivirus software such as Kaspersky Antivirus software installed on the computer.
  • The antivirus software can check whether a file is digitally signed.
  • You receive a specifically crafted or damaged signed file through an email message, an Internet download, or by any other channel.

In this scenario, the antivirus program does not check whether the file is digitally signed, and then the program stops responding. After that, the computer is unprotected, and the antivirus software cannot be restarted, even manually.

Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to the following Microsoft website:
http://support.microsoft.com/contactus/?ws=support
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 running one of the following operating systems:
  • Windows 8.1
  • Windows Server 2012 R2
  • Windows 8
  • Windows 7 SP1
  • Windows Server 2008 R2 SP1
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2


Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

File information

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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 RT 8.1, Windows 8.1 and Windows Server 2012 R2 file information notes

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Important Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" 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:
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    VersionProductMilestoneService branch
    6.3.960 0.16 xxxWindows RT 8.1, Windows 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 RT 8.1, Windows 8.1 and Windows Server 2012 R2" 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 Windows RT 8.1
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.3.9600.16425227,76010-Oct-201313:03Not applicable
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For all supported x86-based versions of Windows 8.1
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.3.9600.16520236,48027-Jan-201422:11x86
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For all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.3.9600.16520317,61628-Jan-201400:17x64
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Windows 8 file information and notes

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Important Windows 8 and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" 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.
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    VersionProductMilestoneService branch
    6.2.920 0.16 xxxWindows 8RTMGDR
    6.2.920 0.20 xxxWindows 8RTMLDR
  • 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" 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 x86-based versions of Windows 8
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.2.9200.16749261,63224-Oct-201304:06x86
Wintrust.dll6.2.9200.20859265,72823-Oct-201322:39x86
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For all supported x64-based versions of Windows 8
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.2.9200.16749337,40824-Oct-201305:49x64
Wintrust.dll6.2.9200.20859333,82423-Oct-201322:33x64
Wintrust.dll6.2.9200.16749261,63224-Oct-201304:06x86
Wintrust.dll6.2.9200.20859265,72823-Oct-201322:39x86
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For all supported ARM-based versions of Windows 8
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.2.9200.16749221,18424-Oct-201303:11Not Applicable
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Windows 7 and Windows Server 2008 R2 file information notes

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Important Windows 7 hotfixes and Windows Server 2008 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 7/Windows Server 2008 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
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    VersionProductMilestoneService branch
    6.1.760 1.18xxxWindows 7 and Windows Server 2008 R2SP1GDR
    6.1.760 1.22xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • 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 and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. 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
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.1.7601.18380175,10428-Jan-201402:07x86
Wintrust.dll6.1.7601.22583175,10428-Jan-201402:10x86
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For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.1.7601.18380224,76828-Jan-201402:32x64
Wintrust.dll6.1.7601.22583224,76828-Jan-201402:40x64
Wintrust.dll6.1.7601.18380175,10428-Jan-201402:07x86
Wintrust.dll6.1.7601.22583175,10428-Jan-201402:10x86
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For all supported IA-64-based versions of Windows Server 2008 R2
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File nameFile versionFile sizeDateTimePlatform
Wintrust.dll6.1.7601.18380500,73628-Jan-201401:40IA-64
Wintrust.dll6.1.7601.22583500,73628-Jan-201401:56IA-64
Wintrust.dll6.1.7601.18380175,10428-Jan-201402:07x86
Wintrust.dll6.1.7601.22583175,10428-Jan-201402:10x86
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Status

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

Additional file information

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

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Additional files for Windows RT 8.1
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File propertyValue
File nameArm_71ca390cd5623c018faf2f62cdbf6281_31bf3856ad364e35_6.3.9600.16519_none_9f8f8e8dccb2bc2b.manifest
File versionNot applicable
File size700
Date (UTC)29-Jan-2014
Time (UTC)06:37
PlatformNot applicable
File nameArm_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16519_none_84a12556b56a4e71.manifest
File versionNot applicable
File size2,468
Date (UTC)29-Jan-2014
Time (UTC)06:37
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,000
Date (UTC)29-Jan-2014
Time (UTC)06:37
PlatformNot applicable
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Additional files for all supported x86-based versions of Windows 8.1
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File propertyValue
File nameUpdate.mum
File versionNot applicable
File size2,000
Date (UTC)29-Jan-2014
Time (UTC)06:14
PlatformNot applicable
File nameX86_e63f23b4ddfdb6dfb00d3b6867d5517c_31bf3856ad364e35_6.3.9600.16520_none_f017dcca61600c69.manifest
File versionNot applicable
File size700
Date (UTC)29-Jan-2014
Time (UTC)06:14
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_848ae078b57d678d.manifest
File versionNot applicable
File size2,465
Date (UTC)27-Jan-2014
Time (UTC)22:24
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 8.1 and of Windows Server 2012 R2
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File propertyValue
File nameAmd64_1be3e5cdfa7a7adfc58a3afd05f509ad_31bf3856ad364e35_6.3.9600.16520_none_5a2630e540086f55.manifest
File versionNot applicable
File size704
Date (UTC)29-Jan-2014
Time (UTC)06:18
PlatformNot applicable
File nameAmd64_e63f23b4ddfdb6dfb00d3b6867d5517c_31bf3856ad364e35_6.3.9600.16520_none_4c36784e19bd7d9f.manifest
File versionNot applicable
File size702
Date (UTC)29-Jan-2014
Time (UTC)06:18
PlatformNot applicable
File nameAmd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_e0a97bfc6ddad8c3.manifest
File versionNot applicable
File size2,467
Date (UTC)28-Jan-2014
Time (UTC)00:41
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size3,108
Date (UTC)29-Jan-2014
Time (UTC)06:18
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.3.9600.16520_none_848ae078b57d678d.manifest
File versionNot applicable
File size2,465
Date (UTC)27-Jan-2014
Time (UTC)22:24
PlatformNot applicable
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Additional file information for Windows 8

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Additional files for all supported x86-based versions of Windows 8
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File nameX86_39c71790c2707a04d52cc9a6d5b9e041_31bf3856ad364e35_6.2.9200.20860_none_0ae0d9cb4d9927c6.manifest
File versionNot Applicable
File size700
Date (UTC)24-Oct-2013
Time (UTC)11:50
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameX86_ebb933153ab3adae9e43d4020c5c8607_31bf3856ad364e35_6.2.9200.16749_none_9d6dcfabf4850a3a.manifest
File versionNot Applicable
File size700
Date (UTC)24-Oct-2013
Time (UTC)11:50
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec898e606b52ad4f.manifest
File versionNot Applicable
File size2,465
Date (UTC)24-Oct-2013
Time (UTC)04:46
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_ecf488b98488a0ec.manifest
File versionNot Applicable
File size2,465
Date (UTC)23-Oct-2013
Time (UTC)23:15
SHA-1 hashNot Applicable
MD5 hashNot Applicable
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Additional files for all supported x64-based versions of Windows 8
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File nameAmd64_01b90f40f6170c631181079d3d102147_31bf3856ad364e35_6.2.9200.20860_none_1f50e59e695026b1.manifest
File versionNot Applicable
File size704
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_39c71790c2707a04d52cc9a6d5b9e041_31bf3856ad364e35_6.2.9200.20860_none_66ff754f05f698fc.manifest
File versionNot Applicable
File size702
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_60a7c4c9d0c0284c439c37a8da3a6224_31bf3856ad364e35_6.2.9200.16749_none_6e6ef32c8ded68d5.manifest
File versionNot Applicable
File size1,048
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_bdb5d470219681a2edf2576d162fc11b_31bf3856ad364e35_6.2.9200.16749_none_8dc5de723aec921a.manifest
File versionNot Applicable
File size704
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_c72ac5d319828c3e19abe6ca88a8adfb_31bf3856ad364e35_6.2.9200.20860_none_1b094121b67a9031.manifest
File versionNot Applicable
File size1,048
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_ebb933153ab3adae9e43d4020c5c8607_31bf3856ad364e35_6.2.9200.16749_none_f98c6b2face27b70.manifest
File versionNot Applicable
File size702
Date (UTC)24-Oct-2013
Time (UTC)11:51
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_48a829e423b01e85.manifest
File versionNot Applicable
File size2,467
Date (UTC)24-Oct-2013
Time (UTC)07:04
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameAmd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_4913243d3ce61222.manifest
File versionNot Applicable
File size2,467
Date (UTC)24-Oct-2013
Time (UTC)01:46
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec898e606b52ad4f.manifest
File versionNot Applicable
File size2,465
Date (UTC)24-Oct-2013
Time (UTC)04:46
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.20860_none_ecf488b98488a0ec.manifest
File versionNot Applicable
File size2,465
Date (UTC)23-Oct-2013
Time (UTC)23:15
SHA-1 hashNot Applicable
MD5 hashNot Applicable
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Additional files for all supported ARM-based versions of Windows 8
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File nameArm_f3857e63cc7e6d0f5eb722235ce39e26_31bf3856ad364e35_6.2.9200.16749_none_ebff436683a0b3fc.manifest
File versionNot Applicable
File size700
Date (UTC)24-Oct-2013
Time (UTC)11:49
SHA-1 hashNot Applicable
MD5 hashNot Applicable
File nameArm_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.2.9200.16749_none_ec8c00b86b4fcc15.manifest
File versionNot Applicable
File size2,465
Date (UTC)24-Oct-2013
Time (UTC)06:39
SHA-1 hashNot Applicable
MD5 hashNot Applicable
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Additional file information for Windows 7 and for Windows Server 2008 R2

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Additional files for all supported x86-based versions of Windows 7
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File propertyValue
File nameUpdate.mum
File versionNot applicable
File size2,138
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameX86_231d569c2514accadf3d265e26ea1023_31bf3856ad364e35_6.1.7601.22583_none_ab0d57423308f63c.manifest
File versionNot applicable
File size700
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameX86_8cc8ccda27105cd7abbeaa93434c8b26_31bf3856ad364e35_6.1.7601.18380_none_0eb0162fa282296c.manifest
File versionNot applicable
File size700
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:35
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:39
PlatformNot applicable
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Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
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File propertyValue
File nameAmd64_0e4c0a4461db77abeb0c3069dc0e847c_31bf3856ad364e35_6.1.7601.22583_none_1ef6a8d275894f71.manifest
File versionNot applicable
File size1,048
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_1c10e39c997fcac54e396e9655b06710_31bf3856ad364e35_6.1.7601.18380_none_00713d8267ec2339.manifest
File versionNot applicable
File size704
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_231d569c2514accadf3d265e26ea1023_31bf3856ad364e35_6.1.7601.22583_none_072bf2c5eb666772.manifest
File versionNot applicable
File size702
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_8cc8ccda27105cd7abbeaa93434c8b26_31bf3856ad364e35_6.1.7601.18380_none_6aceb1b35adf9aa2.manifest
File versionNot applicable
File size702
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_a332ca0bae39b983d63480fd3e3d7e6a_31bf3856ad364e35_6.1.7601.18380_none_219a950070f28dc2.manifest
File versionNot applicable
File size1,048
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_f63c52dc5507f032451a29d3c8c52954_31bf3856ad364e35_6.1.7601.22583_none_6c3d99b78631c742.manifest
File versionNot applicable
File size704
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameAmd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_4d847404b0ececd2.manifest
File versionNot applicable
File size2,428
Date (UTC)28-Jan-2014
Time (UTC)03:02
PlatformNot applicable
File nameAmd64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_4e111393ca07d5c8.manifest
File versionNot applicable
File size2,428
Date (UTC)28-Jan-2014
Time (UTC)03:09
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,774
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:35
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:39
PlatformNot applicable
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Additional files for all supported IA-64-based versions of Windows Server 2008 R2
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File propertyValue
File nameIa64_551a091ba826b95f6e4fd3d62813096a_31bf3856ad364e35_6.1.7601.18380_none_abaac436592bca13.manifest
File versionNot applicable
File size1,046
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameIa64_d952294fb9a83f37ad3e69b72e7af5e2_31bf3856ad364e35_6.1.7601.22583_none_840b0dfc138df1c8.manifest
File versionNot applicable
File size1,046
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameIa64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f1677c76f88d8498.manifest
File versionNot applicable
File size2,427
Date (UTC)28-Jan-2014
Time (UTC)02:22
PlatformNot applicable
File nameIa64_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f41c0611a86d8e.manifest
File versionNot applicable
File size2,427
Date (UTC)28-Jan-2014
Time (UTC)02:27
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,447
Date (UTC)28-Jan-2014
Time (UTC)07:10
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.18380_none_f165d880f88f7b9c.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:35
PlatformNot applicable
File nameX86_microsoft-windows-wintrust-dll_31bf3856ad364e35_6.1.7601.22583_none_f1f2781011aa6492.manifest
File versionNot applicable
File size2,426
Date (UTC)28-Jan-2014
Time (UTC)02:39
PlatformNot applicable
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References

Learn about the terminology Microsoft uses to describe software updates.

Third-party information disclaimer

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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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Properties

Article ID: 2903025 - Last Review: March 12, 2014 - Revision: 2.0
Applies to
  • Windows 8.1 Enterprise, when used with:
    • Windows 8.1
    • Windows 8.1 Pro
    • Windows RT 8.1
  • Windows Server 2012 R2 Datacenter
  • Windows Server 2012 R2 Essentials
  • Windows Server 2012 R2 Foundation
  • Windows Server 2012 R2 Standard
  • Windows 8 Enterprise
  • Windows 8
  • Windows 8 Pro
  • Windows 7 Service Pack 1, when used with:
    • Windows 7 Enterprise
    • Windows 7 Home Basic
    • Windows 7 Home Premium
    • Windows 7 Professional
    • Windows 7 Starter
    • Windows 7 Ultimate
  • Windows Server 2008 R2 Service Pack 1, when used with:
    • Windows Server 2008 R2 Enterprise
    • Windows Server 2008 R2 Datacenter
    • Windows Server 2008 R2 Foundation
    • Windows Server 2008 R2 Standard
    • Windows Server 2008 R2 for Itanium-Based Systems
    • Windows Web Server 2008 R2
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbexpertiseinter kbsurveynew kbbug KB2903025

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