CryptDuplicateKey function doesn't save state for an RC2 40-Bit key in Windows 8.1 or Windows Server 2012 R2

This article describes an issue that occurs when you use the CryptDuplicateKey function to duplicate an RC2 40-bit key in Windows 8.1 or Windows Server 2012 R2. You can fix this issue by using the update in this article. Before you install this update, check out the Prerequisites section.
How to get 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 a Recommended update on Windows Update. For more information on 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.
Note The update for Windows RT 8.1 can be downloaded only from Windows Update.

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.

Registry information

To apply this update, you don't 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 doesn't replace a previously released update.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.
File Information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2

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 0.18 xxxWindows RT 8.1, Windows 8.1, and Windows Server 2012 R2RTMGDR
  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed 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.
Windows RT 8.1
File nameFile versionFile sizeDateTimePlatform
Rsaenh.dll6.3.9600.18191164,79209-Jan-201601:57Not applicable
x86 Windows 8.1
File nameFile versionFile sizeDateTimePlatform
Rsaenh.dll6.3.9600.18191192,12009-Jan-201601:49x86
x64 Windows 8.1 and Windows Server 2012 R2
File nameFile versionFile sizeDateTimePlatform
Rsaenh.dll6.3.9600.18191218,44809-Jan-201601:49x64
Rsaenh.dll6.3.9600.18191192,12009-Jan-201601:49x86

Additional file information

Windows RT 8.1
File propertyValue
File nameArm_d6532b0043323643fa2080d0ae24b28d_31bf3856ad364e35_6.3.9600.18191_none_2a451f30c4f40bf4.manifest
File versionNot applicable
File size698
Date (UTC)09-Jan-2016
Time (UTC)02:04
PlatformNot applicable
File nameArm_microsoft-windows-rsaenh-dll_31bf3856ad364e35_6.3.9600.18191_none_f45b4480cce635b8.manifest
File versionNot applicable
File size2,620
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,574
Date (UTC)09-Jan-2016
Time (UTC)02:04
PlatformNot applicable
x86 Windows 8.1
File propertyValue
File nameUpdate.mum
File versionNot applicable
File size1,574
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameX86_d7967fa530008f9074fbfc89c0d87dd8_31bf3856ad364e35_6.3.9600.18191_none_0a66a2a2b6479f79.manifest
File versionNot applicable
File size698
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameX86_microsoft-windows-rsaenh-dll_31bf3856ad364e35_6.3.9600.18191_none_f458d228cce916f2.manifest
File versionNot applicable
File size2,620
Date (UTC)09-Jan-2016
Time (UTC)02:08
PlatformNot applicable
x64 Windows 8.1 and Windows Server 2012 R2
File propertyValue
File nameAmd64_d7967fa530008f9074fbfc89c0d87dd8_31bf3856ad364e35_6.3.9600.18191_none_66853e266ea510af.manifest
File versionNot applicable
File size700
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameAmd64_fb0620b63d748f32ff4ed35f1d4d4ff1_31bf3856ad364e35_6.3.9600.18191_none_b6bd94f4150e70bf.manifest
File versionNot applicable
File size702
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameAmd64_microsoft-windows-rsaenh-dll_31bf3856ad364e35_6.3.9600.18191_none_50776dac85468828.manifest
File versionNot applicable
File size2,624
Date (UTC)09-Jan-2016
Time (UTC)02:11
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size1,791
Date (UTC)09-Jan-2016
Time (UTC)02:05
PlatformNot applicable
File nameX86_microsoft-windows-rsaenh-dll_31bf3856ad364e35_6.3.9600.18191_none_f458d228cce916f2.manifest
File versionNot applicable
File size2,620
Date (UTC)09-Jan-2016
Time (UTC)02:11
PlatformNot applicable
Properties

Article ID: 3134815 - Last Review: 03/08/2016 19:05:00 - Revision: 2.0

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 RT 8.1

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