Notice

July 18, 2017 - This update is referenced in the July 2017 Preview of the Quality Rollups for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1 that is dated July 18, 2017. This Quality Rollup contains no new updates.

View products that this article applies to.

Introduction

This May 2017 update for Windows 8.1 and Windows Server 2012 R2 includes cumulative reliability improvements in the .NET Framework 3.5. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the "Prerequisites" and "Restart requirement" sections.

Important

  • All updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive updates in the future.

  • 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.

Quality and reliability improvements

For ASP.NET

ASP.NET sequentially executes requests that have the same SessionID. This means that you may see the requests collecting in the queue if there are lots of concurrent requests that have the same SessionID. After you apply this fix, you can limit the number of the requests in the queue through the following appSettings entry:

<appSettings>
   <add key="aspnet:RequestQueueLimitPerSession" value="50"/>
</appSettings>

 

For CLR

If you arrange an array of struct A and an array of struct B as SAFEARRAY and struct A and struct B have identical GUIDs, a memory leak may occur.

Note This update also contains cumulative updates that were released previously, starting from October 11, 2016.

Additional information about this security update

For more information about this security update as it relates to Windows 8.1 and Windows Server 2012 R2, see the following articles in the Microsoft Knowledge Base:

4019290 May 2017 Preview of the Quality Rollup for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, and 4.6.2 updates for Windows 8.1 and Windows Server 2012 R2: May 16, 2017

4032115 July 2017 Preview of the Quality Rollups for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 8.1, Windows Server 2012 R2, and Windows RT 8.1: July 18, 2017

How to get this update

Windows Update

This update is available from Windows Update as an optional update.

Manual download

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

Prerequisites

To apply this update, you must have the .NET Framework 3.5 installed.

Restart requirement

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

File information

The English (United States) 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.

For all supported x86-based versions of systems

File name

File version

File size

Date

Time

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:09

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.dll

2.0.50727.8759

3,203,072

30-Mar-2017

13:14

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

mscorlib.dll

2.0.50727.8762

4,554,752

22-Apr-2017

13:09

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8762

990,368

22-Apr-2017

13:09

mscorwks.dll

2.0.50727.8762

5,946,520

22-Apr-2017

13:09

sos.dll

2.0.50727.8762

389,776

22-Apr-2017

13:09

webengine.dll

2.0.50727.8762

437,400

22-Apr-2017

13:09

wminet_utils.dll

2.0.50727.8763

116,896

22-Apr-2017

13:09

presentationcore.dll

3.0.6920.8773

4,222,976

30-Mar-2017

13:15

presentationfontcache.exe.config

161

20-Aug-2015

13:24

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

2,975,744

22-Apr-2017

13:09

system.printing.dll

3.0.6920.8773

372,736

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,287,936

22-Apr-2017

13:09

penimc.dll

3.0.6920.8773

68,752

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

131,248

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

For all supported x64-based versions of systems

File name

File version

File size

Date

Time

big5.nlp

66,728

22-Apr-2017

13:08

bopomofo.nlp

82,172

22-Apr-2017

13:08

ksc.nlp

116,756

22-Apr-2017

13:08

mscorlib.dll

2.0.50727.8762

4,571,136

22-Apr-2017

13:08

normidna.nlp

59,342

22-Apr-2017

13:08

normnfc.nlp

45,794

22-Apr-2017

13:08

normnfd.nlp

39,284

22-Apr-2017

13:08

normnfkc.nlp

66,384

22-Apr-2017

13:08

normnfkd.nlp

60,294

22-Apr-2017

13:08

prc.nlp

83,748

22-Apr-2017

13:08

prcp.nlp

83,748

22-Apr-2017

13:08

sortkey.nlp

262,148

22-Apr-2017

13:08

sorttbls.nlp

20,320

22-Apr-2017

13:08

xjis.nlp

28,288

22-Apr-2017

13:08

aspnet_wp.exe

2.0.50727.8762

43,160

22-Apr-2017

13:08

mscordacwks.dll

2.0.50727.8762

1,757,344

22-Apr-2017

13:08

mscorwks.dll

2.0.50727.8762

10,007,704

22-Apr-2017

13:08

sos.dll

2.0.50727.8762

486,032

22-Apr-2017

13:08

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:08

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:15

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:08

system.dll

2.0.50727.8759

3,203,072

30-Mar-2017

13:15

webengine.dll

2.0.50727.8762

746,648

22-Apr-2017

13:08

wminet_utils.dll

2.0.50727.8763

140,960

22-Apr-2017

13:08

presentationcore.dll

3.0.6920.8773

4,006,400

30-Mar-2017

13:15

presentationfontcache.exe.config

161

22-Aug-2015

13:27

wpfgfx_v0300.dll

3.0.6920.8773

2,256,032

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

3,150,336

22-Apr-2017

13:08

system.printing.dll

3.0.6920.8773

358,400

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,296,128

22-Apr-2017

13:08

penimc.dll

3.0.6920.8773

85,648

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

4,640,768

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

172,208

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,118,208

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:09

system.security.dll

2.0.50727.8759

270,336

30-Mar-2017

13:14

system.web.regularexpressions.dll

2.0.50727.8762

98,304

22-Apr-2017

13:09

system.dll

2.0.50727.8759

3,203,072

30-Mar-2017

13:14

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

big5.nlp

66,728

23-Sep-2015

13:34

bopomofo.nlp

82,172

23-Sep-2015

13:34

ksc.nlp

116,756

23-Sep-2015

13:34

mscorlib.dll

2.0.50727.8762

4,554,752

22-Apr-2017

13:09

normidna.nlp

59,342

23-Sep-2015

13:34

normnfc.nlp

45,794

23-Sep-2015

13:34

normnfd.nlp

39,284

23-Sep-2015

13:34

normnfkc.nlp

66,384

23-Sep-2015

13:34

normnfkd.nlp

60,294

23-Sep-2015

13:34

prc.nlp

83,748

23-Sep-2015

13:34

prcp.nlp

83,748

23-Sep-2015

13:34

sortkey.nlp

262,148

23-Sep-2015

13:34

sorttbls.nlp

20,320

23-Sep-2015

13:34

xjis.nlp

28,288

23-Sep-2015

13:34

aspnet_wp.exe

2.0.50727.8762

31,384

22-Apr-2017

13:09

mscordacwks.dll

2.0.50727.8762

990,368

22-Apr-2017

13:09

mscorwks.dll

2.0.50727.8762

5,946,520

22-Apr-2017

13:09

sos.dll

2.0.50727.8762

389,776

22-Apr-2017

13:09

webengine.dll

2.0.50727.8762

437,400

22-Apr-2017

13:09

wminet_utils.dll

2.0.50727.8763

116,896

22-Apr-2017

13:09

presentationcore.dll

3.0.6920.8773

4,222,976

30-Mar-2017

13:15

presentationfontcache.exe.config

161

20-Aug-2015

13:24

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

30-Mar-2017

13:15

system.data.dll

2.0.50727.8762

2,975,744

22-Apr-2017

13:09

system.printing.dll

3.0.6920.8773

372,736

30-Mar-2017

13:15

system.web.dll

2.0.50727.8762

5,287,936

22-Apr-2017

13:09

penimc.dll

3.0.6920.8773

68,752

30-Mar-2017

13:15

presentationframework.dll

3.0.6920.8773

5,283,840

30-Mar-2017

13:15

presentationhostdll.dll

3.0.6920.8773

131,248

30-Mar-2017

13:15

reachframework.dll

3.0.6920.8773

532,480

30-Mar-2017

13:15

windowsbase.dll

3.0.6920.8773

1,257,472

30-Mar-2017

13:15

Applies to

This article applies to the following:

  • Microsoft .NET Framework 3.5 when used with:

    • Windows Server 2012 R2

    • Windows 8.1

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