This update applies to Microsoft .NET Native when they are used together with Windows 8.1, Windows Server 2012 R2, or Windows RT 8.1.

Symptoms

Error reports that are sent for .NET Native applications may restrict the investigation of the root causes of errors. The performance of .NET Native applications may be slightly (by a few percentage points) lower than ideal.

This issue occurs in Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2.

Cause

This issue occurs because some information may not be included in error reports that are sent by Windows Error Reporting (WER) that can limit analysis capabilities of such reports that are sent for .NET Native applications.

.NET Native applications that run on x64 and x86 systems will rely only on an app-local runtime without any system services that may result in less than optimal performance of .NET Native applications.

Resolution

This update contains the necessary services to allow capturing of error reports that contain relevant root-cause analysis data. This update also improves the performance of .NET Native applications.

Windows Update

This update is available from Windows Update.

Download information

The following file is available for download from the Microsoft Download Center:
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.

Command-line switches for this update

For more information about the various command-line switches that are supported by this update, go to the "Command-Line options" section of the following MSDN website:


.NET Framework Deployment Guide for Developers

Restart requirement

You may have to restart the computer after you install this software if any affected files are being used. We recommend that you close all applications that are using the .NET Framework before you apply this update.

Update replacement information



This update does not replace any previously released update.

Update removal information

To remove this update, use the Programs and Features item in Control Panel.

The English version of this software update package has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

For Windows RT 8.1

File name

File version

File size

Date

Time

mrt_map.dll

1.0.51112.34112

75,248

08-Apr-2014

22:46

mrt100.dll

1.0.30319.34112

30,184

08-Apr-2014

22:46

For all supported x86-based versions of Windows 8.1

File name

File version

File size

Date

Time

mrt_map.dll

1.0.51112.34112

80,032

08-Apr-2014

18:54

mrt100.dll

1.0.30319.34112

26,784

08-Apr-2014

18:54

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

File name

File version

File size

Date

Time

mrt_map.dll

1.0.51112.34112

86,688

08-Apr-2014

22:46

mrt100.dll

1.0.30319.34112

28,320

08-Apr-2014

22:46

mrt_map.dll

1.0.51112.34112

80,032

08-Apr-2014

18:54

mrt100.dll

1.0.30319.34112

26,784

08-Apr-2014

18:54



Status

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

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