Notice

July 18, 2017 This update is referenced in the July 2017 Preview of the Quality Rollups for the .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 7 SP1 and Windows Server 2008 R2 SP1 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 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1 includes cumulative reliability improvements in the .NET Framework 3.5.1. 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

  • 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 on October 11, 2016.

Additional information about this security update

For more information about this security update as it relates to Windows 7 Service Pack 1 and Windows Server 2008 R2 Service Pack 1, see the following articles in the Microsoft Knowledge Base:

4019288 May 2017 Preview of the Quality Rollups for the .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, and 4.6.2 for Windows 7 and Windows Server 2008 R2: May 16, 2017

4032113 July 2017 Preview of the Quality Rollups for the .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7 for Windows 7 SP1 and Windows Server 2008 R2 SP1: 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 3.5.1 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

29-Mar-2017

13:05

reachframework.dll

3.0.6920.8773

532,480

29-Mar-2017

13:05

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:05

system.security.dll

2.0.50727.8759

270,336

28-Mar-2017

13:05

system.web.regularexpressions.dll

2.0.50727.8762

98,304

07-Apr-2017

13:05

system.dll

2.0.50727.8759

3,203,072

28-Mar-2017

13:05

windowsbase.dll

3.0.6920.8773

1,257,472

29-Mar-2017

13:05

big5.nlp

66,728

23-Mar-2016

22:39

bopomofo.nlp

82,172

23-Mar-2016

22:39

ksc.nlp

116,756

23-Mar-2016

22:39

mscorlib.dll

2.0.50727.8762

4,554,752

07-Apr-2017

13:05

normidna.nlp

59,342

23-Mar-2016

22:39

normnfc.nlp

45,794

23-Mar-2016

22:39

normnfd.nlp

39,284

23-Mar-2016

22:39

normnfkc.nlp

66,384

23-Mar-2016

22:39

normnfkd.nlp

60,294

23-Mar-2016

22:39

prc.nlp

83,748

23-Mar-2016

22:39

prcp.nlp

83,748

23-Mar-2016

22:39

sortkey.nlp

262,148

23-Mar-2016

22:39

sorttbls.nlp

20,320

23-Mar-2016

22:39

xjis.nlp

28,288

23-Mar-2016

22:39

aspnet_wp.exe

2.0.50727.8762

31,384

07-Apr-2017

13:05

mscordacwks.dll

2.0.50727.8762

990,368

07-Apr-2017

13:05

mscorwks.dll

2.0.50727.8762

5,946,520

07-Apr-2017

13:05

sos.dll

2.0.50727.8762

389,776

07-Apr-2017

13:05

webengine.dll

2.0.50727.8762

437,400

07-Apr-2017

13:05

wminet_utils.dll

2.0.50727.8763

116,896

22-Apr-2017

13:05

presentationcore.dll

3.0.6920.8773

4,222,976

29-Mar-2017

13:05

presentationfontcache.exe.config

161

23-Mar-2016

22:38

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

29-Mar-2017

13:05

system.data.dll

2.0.50727.8762

2,975,744

06-Apr-2017

13:05

system.printing.dll

3.0.6920.8773

372,736

29-Mar-2017

13:05

system.web.dll

2.0.50727.8762

5,287,936

07-Apr-2017

13:05

penimc.dll

3.0.6920.8773

68,752

29-Mar-2017

13:05

presentationframework.dll

3.0.6920.8773

5,283,840

29-Mar-2017

13:05

presentationhostdll.dll

3.0.6920.8773

131,248

29-Mar-2017

13:05

reachframework.dll

3.0.6920.8773

532,480

29-Mar-2017

13:05

windowsbase.dll

3.0.6920.8773

1,257,472

29-Mar-2017

13:05

For all supported x64-based versions of systems

File name

File version

File size

Date

Time

big5.nlp

66,728

23-Mar-2016

22:39

bopomofo.nlp

82,172

23-Mar-2016

22:39

ksc.nlp

116,756

23-Mar-2016

22:39

mscorlib.dll

2.0.50727.8762

4,571,136

07-Apr-2017

13:05

normidna.nlp

59,342

23-Mar-2016

22:40

normnfc.nlp

45,794

23-Mar-2016

22:40

normnfd.nlp

39,284

23-Mar-2016

22:40

normnfkc.nlp

66,384

23-Mar-2016

22:40

normnfkd.nlp

60,294

23-Mar-2016

22:40

prc.nlp

83,748

23-Mar-2016

22:40

prcp.nlp

83,748

23-Mar-2016

22:40

sortkey.nlp

262,148

23-Mar-2016

22:40

sorttbls.nlp

20,320

23-Mar-2016

22:40

xjis.nlp

28,288

23-Mar-2016

22:40

aspnet_wp.exe

2.0.50727.8762

43,160

07-Apr-2017

13:05

mscordacwks.dll

2.0.50727.8762

1,757,344

07-Apr-2017

13:05

mscorwks.dll

2.0.50727.8762

10,007,704

07-Apr-2017

13:05

sos.dll

2.0.50727.8762

486,032

07-Apr-2017

13:05

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:06

system.security.dll

2.0.50727.8759

270,336

28-Mar-2017

13:05

system.web.regularexpressions.dll

2.0.50727.8762

98,304

07-Apr-2017

13:05

system.dll

2.0.50727.8759

3,203,072

28-Mar-2017

13:05

webengine.dll

2.0.50727.8762

746,648

07-Apr-2017

13:05

wminet_utils.dll

2.0.50727.8763

140,960

22-Apr-2017

13:06

presentationcore.dll

3.0.6920.8773

4,006,400

29-Mar-2017

13:05

presentationfontcache.exe.config

161

23-Mar-2016

22:39

wpfgfx_v0300.dll

3.0.6920.8773

2,256,032

29-Mar-2017

13:05

system.data.dll

2.0.50727.8762

3,150,336

06-Apr-2017

13:05

system.printing.dll

3.0.6920.8773

358,400

29-Mar-2017

13:05

system.web.dll

2.0.50727.8762

5,296,128

07-Apr-2017

13:05

penimc.dll

3.0.6920.8773

85,648

29-Mar-2017

13:05

presentationframework.dll

3.0.6920.8773

4,640,768

29-Mar-2017

13:05

presentationhostdll.dll

3.0.6920.8773

172,208

29-Mar-2017

13:05

reachframework.dll

3.0.6920.8773

532,480

29-Mar-2017

13:05

windowsbase.dll

3.0.6920.8773

1,118,208

29-Mar-2017

13:05

presentationframework.dll

3.0.6920.8773

5,283,840

29-Mar-2017

13:05

reachframework.dll

3.0.6920.8773

532,480

29-Mar-2017

13:05

system.management.dll

2.0.50727.8763

389,120

22-Apr-2017

13:05

system.security.dll

2.0.50727.8759

270,336

28-Mar-2017

13:05

system.web.regularexpressions.dll

2.0.50727.8762

98,304

07-Apr-2017

13:05

system.dll

2.0.50727.8759

3,203,072

28-Mar-2017

13:05

windowsbase.dll

3.0.6920.8773

1,257,472

29-Mar-2017

13:05

big5.nlp

66,728

23-Mar-2016

22:39

bopomofo.nlp

82,172

23-Mar-2016

22:39

ksc.nlp

116,756

23-Mar-2016

22:39

mscorlib.dll

2.0.50727.8762

4,554,752

07-Apr-2017

13:05

normidna.nlp

59,342

23-Mar-2016

22:39

normnfc.nlp

45,794

23-Mar-2016

22:39

normnfd.nlp

39,284

23-Mar-2016

22:39

normnfkc.nlp

66,384

23-Mar-2016

22:39

normnfkd.nlp

60,294

23-Mar-2016

22:39

prc.nlp

83,748

23-Mar-2016

22:39

prcp.nlp

83,748

23-Mar-2016

22:39

sortkey.nlp

262,148

23-Mar-2016

22:39

sorttbls.nlp

20,320

23-Mar-2016

22:39

xjis.nlp

28,288

23-Mar-2016

22:39

aspnet_wp.exe

2.0.50727.8762

31,384

07-Apr-2017

13:05

mscordacwks.dll

2.0.50727.8762

990,368

07-Apr-2017

13:05

mscorwks.dll

2.0.50727.8762

5,946,520

07-Apr-2017

13:05

sos.dll

2.0.50727.8762

389,776

07-Apr-2017

13:05

webengine.dll

2.0.50727.8762

437,400

07-Apr-2017

13:05

wminet_utils.dll

2.0.50727.8763

116,896

22-Apr-2017

13:05

presentationcore.dll

3.0.6920.8773

4,222,976

29-Mar-2017

13:05

presentationfontcache.exe.config

161

23-Mar-2016

22:38

wpfgfx_v0300.dll

3.0.6920.8773

1,737,888

29-Mar-2017

13:05

system.data.dll

2.0.50727.8762

2,975,744

06-Apr-2017

13:05

system.printing.dll

3.0.6920.8773

372,736

29-Mar-2017

13:05

system.web.dll

2.0.50727.8762

5,287,936

07-Apr-2017

13:05

penimc.dll

3.0.6920.8773

68,752

29-Mar-2017

13:05

presentationframework.dll

3.0.6920.8773

5,283,840

29-Mar-2017

13:05

presentationhostdll.dll

3.0.6920.8773

131,248

29-Mar-2017

13:05

reachframework.dll

3.0.6920.8773

532,480

29-Mar-2017

13:05

windowsbase.dll

3.0.6920.8773

1,257,472

29-Mar-2017

13:05

 

Applies to

This article applies to the following:
 

  • Microsoft .NET Framework 3.5.1 when used with:

    • Windows Server 2008 R2 Service Pack 1

    • Windows 7 Service Pack 1

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