Applies to:

Microsoft .NET Framework 4.6, Microsoft .NET Framework 4.6.1, Microsoft .NET Framework 4.6.2, Microsoft .NET Framework 4.7, Microsoft .NET Framework 4.7.1, Microsoft .NET Framework 4.7.2

The February 2019 update for Windows Server 2012 includes cumulative reliability improvements in .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2. 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 8.1, Windows RT 8.1, and Windows Server 2012 R2 require that update KB 2919355 is installed. We recommend that you install update KB 2919355 on your Windows 8.1-based, Windows RT 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

CLR1

Addresses an issue in System.Threading.Timer where a single global queue that was protected by a single process-wide lock causing a issues with scalability where Timers are used frequently on multi-CPU machine.  The fix can be opted into with an AppContext switch:

SQL2

Addresses an issue that caused compatibility breaks seen in some System.Data.SqlClient usage scenarios.

WPF3

 Improved the memory allocation and cleanup scheduling behavior of the weak-event pattern.   To opt-in to these improvements, set AppContext switches to 'true':  Switch.MS.Internal.EnableWeakEventMemoryImprovements and Switch.MS.Internal.EnableCleanupSchedulingImprovements.


1 Common Language Runtime (CLR)
2 SQL Server (SQL)
3 Windows Presentation Foundation (WPF)

Additional information about this update

For more information about this update as it relates to Windows Server 2012, see the following article in the Microsoft Knowledge Base:

4487258 February 2019 Preview of the Quality Rollups for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 8.1, Windows 8.1 RT and Server 2012 R2 (KB 4487258)

How to obtain and install the update

Method 1: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog.
 

Method 2: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Type 4487257 in the Search box, and then select Search

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close to return to WSUS.

The updates are now available for installation through WSUS.

Prerequisites

To apply this update, you must have .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, or 4.7.2 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.

Update replacement information

This update replaces previously released update KB 4481489.

File information

 

Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2

File attributes for all supported x86 based versions of systems

File name

File version

File size

Date

Time

Platform

Mscorlib.dll

4.7.3362.0

5,646,600

04-Jan-2019

23:00

Not applicable

Normidna.nlp

Not applicable

59,342

15-May-2018

18:22

Not applicable

Normnfc.nlp

Not applicable

47,076

15-May-2018

18:22

Not applicable

Normnfd.nlp

Not applicable

40,566

15-May-2018

18:22

Not applicable

Normnfkc.nlp

Not applicable

67,808

15-May-2018

18:22

Not applicable

Normnfkd.nlp

Not applicable

61,718

15-May-2018

18:22

Not applicable

Clrjit.dll

4.7.3362.0

686,040

04-Jan-2019

23:00

Not applicable

Clr.dll

4.7.3362.0

6,752,520

04-Jan-2019

23:00

Not applicable

Mscordacwks.dll

4.7.3362.0

1,296,648

04-Jan-2019

23:00

Not applicable

Mscordbi.dll

4.7.3362.0

1,131,784

04-Jan-2019

23:00

Not applicable

Mscoreei.dll

4.6.1099.0

514,544

27-Mar-2017

03:27

Not applicable

Mscorlib.ni.dll

4.7.3362.0

20,741,760

04-Jan-2019

23:04

Not applicable

Msvcp120_clr0400.dll

12.0.52242.36242

602,080

13-Dec-2018

02:35

Not applicable

Msvcr120_clr0400.dll

12.0.52242.36242

634,336

13-Dec-2018

02:35

Not applicable

Sos.dll

4.7.3362.0

648,664

04-Jan-2019

23:00

Not applicable

System.componentmodel.dataannotations.dll

4.6.1099.0

125,760

27-Mar-2017

03:33

x86

System.core.dll

4.7.3362.0

1,552,208

04-Jan-2019

23:04

x86

System.web.extensions.dll

4.7.3282.0

1,850,264

31-Oct-2018

01:33

x86

Wminet_utils.dll

4.7.2102.0

110,592

06-Jun-2017

23:10

Not applicable

Workflowservicehostperformancecounters.dll

4.7.3353.0

72,664

19-Dec-2018

23:10

Not applicable

System.data.dll

4.7.3260.0

3,454,136

05-Oct-2018

21:07

Not applicable

System.transactions.dll

4.7.3221.0

307,328

30-Aug-2018

22:08

Not applicable

System.web.dll

4.7.3282.0

5,417,224

31-Oct-2018

01:30

Not applicable

Smdiagnostics.dll

4.7.3324.0

74,048

07-Dec-2018

21:01

x86

System.activities.dll

4.7.3324.0

1,532,712

07-Dec-2018

21:01

x86

System.componentmodel.dataannotations.dll

4.6.1099.0

125,760

27-Mar-2017

03:33

x86

System.configuration.dll

4.7.3324.0

419,648

07-Dec-2018

21:01

x86

System.core.dll

4.7.3362.0

1,552,208

04-Jan-2019

23:04

x86

System.data.sqlxml.dll

4.7.2612.0

734,400

22-Nov-2017

20:59

x86

System.deployment.dll

4.6.1099.0

846,016

27-Mar-2017

03:33

x86

System.directoryservices.protocols.dll

4.6.1099.0

200,488

27-Mar-2017

03:33

x86

System.drawing.dll

4.6.1099.0

594,616

27-Mar-2017

03:33

x86

System.identitymodel.dll

4.7.3324.0

1,090,368

07-Dec-2018

21:01

x86

System.management.dll

4.7.2102.0

415,432

06-Jun-2017

23:17

x86

System.net.http.dll

4.7.2634.0

203,352

02-Feb-2018

21:11

x86

System.runtime.remoting.dll

4.7.2114.0

347,368

30-Aug-2017

06:04

x86

System.runtime.serialization.dll

4.7.3324.0

1,056,552

07-Dec-2018

21:01

x86

System.security.dll

4.7.2650.0

324,696

21-Mar-2018

04:49

x86

System.servicemodel.internals.dll

4.7.3324.0

260,928

07-Dec-2018

21:01

x86

System.servicemodel.dll

4.7.3324.0

6,322,496

07-Dec-2018

21:01

x86

System.web.applicationservices.dll

4.7.3282.0

71,120

31-Oct-2018

01:33

x86

System.web.extensions.dll

4.7.3282.0

1,850,264

31-Oct-2018

01:33

x86

System.windows.forms.dll

4.7.3324.0

5,236,640

07-Dec-2018

21:01

x86

System.xaml.dll

4.7.3362.0

642,176

04-Jan-2019

23:04

x86

System.xml.dll

4.7.2612.0

2,670,224

22-Nov-2017

20:59

x86

System.dll

4.7.3362.0

3,559,552

04-Jan-2019

23:04

x86

File attributes for all supported x64 based versions of systems

File name

File version

File size

Date

Time

Platform

SP requirement

Service branch

Presentationframework-systemdata.dll

4.7.3362.0

24,320

04-Jan-2019

23:04

x86

None

Not applicable

Presentationframework.dll

4.7.3362.0

6,237,240

04-Jan-2019

23:04

x86

None

Not applicable

Smdiagnostics.dll

4.7.3324.0

74,048

07-Dec-2018

21:00

x86

None

Not applicable

System.activities.dll

4.7.3324.0

1,532,712

07-Dec-2018

21:00

x86

None

Not applicable

System.componentmodel.dataannotations.dll

4.6.1099.0

125,760

27-Mar-2017

03:33

x86

None

Not applicable

System.configuration.dll

4.7.3324.0

419,648

07-Dec-2018

21:00

x86

None

Not applicable

System.core.dll

4.7.3362.0

1,552,208

04-Jan-2019

23:04

x86

None

Not applicable

System.data.entity.dll

4.7.2102.0

4,033,744

06-Jun-2017

23:17

x86

None

Not applicable

System.data.sqlxml.dll

4.7.2612.0

734,400

22-Nov-2017

20:59

x86

None

Not applicable

System.deployment.dll

4.6.1099.0

846,016

27-Mar-2017

03:33

x86

None

Not applicable

System.directoryservices.accountmanagement.dll

4.7.2623.0

296,216

30-Nov-2017

04:16

x86

None

Not applicable

System.directoryservices.protocols.dll

4.6.1099.0

200,488

27-Mar-2017

03:33

x86

None

Not applicable

System.drawing.dll

4.6.1099.0

594,616

27-Mar-2017

03:33

x86

None

Not applicable

System.identitymodel.services.dll

4.7.3324.0

198,400

07-Dec-2018

21:00

x86

None

Not applicable

System.identitymodel.dll

4.7.3324.0

1,090,368

07-Dec-2018

21:00

x86

None

Not applicable

System.management.dll

4.7.2102.0

415,432

06-Jun-2017

23:17

x86

None

Not applicable

System.net.http.dll

4.7.2634.0

203,352

02-Feb-2018

21:11

x86

None

Not applicable

System.runtime.caching.dll

4.6.1649.1

108,920

21-Apr-2017

05:35

x86

None

Not applicable

System.runtime.remoting.dll

4.7.2114.0

347,368

30-Aug-2017

06:04

x86

None

Not applicable

System.runtime.serialization.dll

4.7.3324.0

1,056,552

07-Dec-2018

21:00

x86

None

Not applicable

System.security.dll

4.7.2650.0

324,696

21-Mar-2018

04:49

x86

None

Not applicable

System.servicemodel.channels.dll

4.7.3324.0

157,952

07-Dec-2018

21:00

x86

None

Not applicable

System.servicemodel.discovery.dll

4.7.3324.0

308,464

07-Dec-2018

21:00

x86

None

Not applicable

System.servicemodel.internals.dll

4.7.3324.0

260,928

07-Dec-2018

21:00

x86

None

Not applicable

System.servicemodel.routing.dll

4.6.1099.0

130,288

27-Mar-2017

03:33

x86

None

Not applicable

System.servicemodel.washosting.dll

4.7.3324.0

40,192

07-Dec-2018

21:00

x86

None

Not applicable

System.servicemodel.dll

4.7.3324.0

6,322,496

07-Dec-2018

21:00

x86

None

Not applicable

System.web.applicationservices.dll

4.7.3282.0

71,120

31-Oct-2018

01:33

x86

None

Not applicable

System.web.extensions.dll

4.7.3282.0

1,850,264

31-Oct-2018

01:33

x86

None

Not applicable

System.windows.controls.ribbon.dll

4.7.3362.0

742,456

04-Jan-2019

23:04

x86

None

Not applicable

System.windows.forms.dll

4.7.3324.0

5,236,640

07-Dec-2018

21:00

x86

None

Not applicable

System.workflow.activities.dll

4.7.3353.0

1,051,192

19-Dec-2018

23:13

x86

None

Not applicable

System.workflow.componentmodel.dll

4.7.3353.0

1,549,880

19-Dec-2018

23:13

x86

None

Not applicable

System.workflow.runtime.dll

4.7.3353.0

498,936

19-Dec-2018

23:13

x86

None

Not applicable

System.xaml.dll

4.7.3362.0

642,176

04-Jan-2019

23:04

x86

None

Not applicable

System.xml.dll

4.7.2612.0

2,670,224

22-Nov-2017

20:59

x86

None

Not applicable

System.dll

4.7.3362.0

3,559,552

04-Jan-2019

23:04

x86

None

Not applicable

Uiautomationclientsideproviders.dll

4.7.3362.0

361,016

04-Jan-2019

23:04

x86

None

Not applicable

Uiautomationclient.dll

4.7.3362.0

177,720

04-Jan-2019

23:04

x86

None

Not applicable

Uiautomationprovider.dll

4.7.3362.0

48,904

04-Jan-2019

23:04

x86

None

Not applicable

Uiautomationtypes.dll

4.7.3362.0

220,936

04-Jan-2019

23:04

x86

None

Not applicable

Windowsbase.dll

4.7.3362.0

1,296,136

04-Jan-2019

23:04

x86

None

Not applicable

Mscorlib.dll

4.7.3362.0

5,645,368

04-Jan-2019

23:04

x86

None

Not applicable

Normidna.nlp

Not applicable

59,342

15-May-2018

18:22

Not applicable

None

Not applicable

Normnfc.nlp

Not applicable

47,076

15-May-2018

18:22

Not applicable

None

Not applicable

Normnfd.nlp

Not applicable

40,566

15-May-2018

18:22

Not applicable

None

Not applicable

Normnfkc.nlp

Not applicable

67,808

15-May-2018

18:22

Not applicable

None

Not applicable

Normnfkd.nlp

Not applicable

61,718

15-May-2018

18:22

Not applicable

None

Not applicable

Aspnet_perf.dll

4.7.3282.0

42,792

31-Oct-2018

01:33

x86

SPN

X86_NETFX4-ASP

Aspnet_state_perf.h

Not applicable

318

30-Oct-2018

23:38

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_state_perf.ini

Not applicable

42,996

31-Oct-2018

01:34

Not applicable

SPN

X86_NETFX4-ASP

Aspnet_wp.exe

4.7.3282.0

46,088

31-Oct-2018

01:33

x86

SPN

X86_NETFX4-ASP

Clrjit.dll

4.7.3362.0

522,808

04-Jan-2019

23:04

x86

None

Not applicable

Clr.dll

4.7.3362.0

7,249,672

04-Jan-2019

23:04

x86

None

Not applicable

Dfdll.dll

4.6.1099.0

154,768

27-Mar-2017

03:33

x86

None

Not applicable

Globalmonospace.compositefont

Not applicable

26,040

30-Oct-2018

22:50

Not applicable

SPA

X86_NETFX4-GLOBALMONOSP

Globalsansserif.compositefont

Not applicable

26,489

30-Oct-2018

22:50

Not applicable

None

Not applicable

Globalserif.compositefont

Not applicable

29,779

30-Oct-2018

22:50

Not applicable

None

Not applicable

Globaluserinterface.compositefont

Not applicable

186,009

21-Dec-2018

04:47

Not applicable

None

Not applicable

Mscordacwks.dll

4.7.3362.0

1,343,032

04-Jan-2019

23:04

x86

None

Not applicable

Mscordbi.dll

4.7.3362.0

1,168,952

04-Jan-2019

23:04

x86

None

Not applicable

Mscoreei.dll

4.6.1099.0

497,824

27-Mar-2017

03:33

x86

None

Not applicable

Mscorlib.ni.dll

4.7.3362.0

20,551,080

04-Jan-2019

23:04

x86

None

Not applicable

Msvcp120_clr0400.dll

12.0.52519.0

485,576

13-Dec-2018

02:35

x86

None

Not applicable

Msvcr120_clr0400.dll

12.0.52519.0

987,840

13-Dec-2018

02:35

x86

None

Not applicable

Penimc.dll

14.7.3362.0

19,000

04-Jan-2019

23:04

x86

None

Not applicable

Penimc2_v0400.dll

4.7.3362.0

86,280

04-Jan-2019

23:04

x86

None

Not applicable

Penimc_v0400.dll

4.7.3362.0

24,632

04-Jan-2019

23:04

x86

None

Not applicable

Peverify.dll

4.7.3362.0

188,472

04-Jan-2019

23:04

x86

None

Not applicable

Presentationhost_v0400.dll.mui

4.7.3362.0

84,536

04-Jan-2019

23:04

Not applicable

None

Not applicable

Presentationhost_v0400.dll

4.7.3362.0

214,280

04-Jan-2019

23:04

x86

None

Not applicable

Presentationnative_v0400.dll

4.7.3362.0

826,936

04-Jan-2019

23:04

x86

None

Not applicable

Servicemodel.mof

Not applicable

88,383

30-Oct-2018

22:26

Not applicable

None

Not applicable

Servicemodel.mof.uninstall

Not applicable

896

30-Oct-2018

22:26

Not applicable

None

Not applicable

Servicemonikersupport.dll

4.7.3324.0

29,440

07-Dec-2018

21:00

x86

None

Not applicable

Sos.dll

4.7.3362.0

743,688

04-Jan-2019

23:04

x86

None

Not applicable

System.componentmodel.dataannotations.dll

4.6.1099.0

125,760

27-Mar-2017

03:33

x86

None

Not applicable

System.core.dll

4.7.3362.0

1,552,208

04-Jan-2019

23:04

x86

None

Not applicable

System.data.entity.dll

4.7.2102.0

4,033,744

06-Jun-2017

23:17

x86

None

Not applicable

System.web.extensions.dll

4.7.3282.0

1,850,264

31-Oct-2018

01:33

x86

None

Not applicable

Webengine4.dll

4.7.3282.0

550,152

31-Oct-2018

01:33

x86

None

Not applicable

Webengine.dll

4.7.3282.0

24,840

31-Oct-2018

01:33

x86

None

Not applicable

Wminet_utils.dll

4.7.2102.0

136,368

06-Jun-2017

23:17

x86

None

Not applicable

Workflowservicehostperformancecounters.dll

4.7.3353.0

89,352

19-Dec-2018

23:13

x86

None

Not applicable

Wpfgfx_v0400.dll

4.7.3362.0

1,345,080

04-Jan-2019

23:04

x86

None

Not applicable

Presentationcore.dll

4.7.3362.0

3,636,280

04-Jan-2019

23:04

x86

None

Not applicable

System.data.dll

4.7.3260.0

3,462,912

05-Oct-2018

21:12

x86

None

Not applicable

System.transactions.dll

4.7.3221.0

309,328

30-Aug-2018

22:13

x86

None

Not applicable

System.web.dll

4.7.3282.0

5,416,232

31-Oct-2018

01:33

x86

None

Not applicable

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