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

IMPORTANT Verify that you have installed the required updates listed in the How to get this update section before installing this update. 

IMPORTANT Some customers who use Windows Server 2008 R2 SP1 and have activated their ESU multiple activation key (MAK) add-on before installing the January 14, 2020 updates might need to re-activate their key. Re-activation on the affected devices should only be required once.  For information on activation, see this blog post.

IMPORTANT WSUS scan cab files will continue to be available for Windows 7 SP1 and Windows Server 2008 R2 SP1. If you have a subset of devices running these operating systems without ESU, they might show as non-compliant in your patch management and compliance toolsets.

IMPORTANT Customers who have purchased the Extended Security Update (ESU) for on-premises versions of these operating systems must follow the procedures in KB4522133 to continue receiving security updates after extended support ends on January 14, 2020. For more information on ESU and which editions are supported, see KB4497181.

IMPORTANT Starting on January 15, 2020, a full-screen notification will appear that describes the risk of continuing to use Windows 7 Service Pack 1 after it reaches end of support on January 14, 2020. The notification will remain on the screen until you interact with it. This notification will only appear on the following editions of Windows 7 Service Pack 1:

Note The notification will not appear on domain-joined machines or machines in kiosk mode.

IMPORTANT Starting in August, 2019, updates to .NET Framework 4.6 and above, for Windows Server 2008 SP1, Windows Server 2008 R2 SP1, and Windows 7SP1, require SHA-2 Code signing support. Please make sure that you have all the latest Windows Updates before applying this update to avoid installation issues. For more detailed information about SHA-2 code signing support updates, please see KB 4474419.

IMPORTANT All updates for .NET Framework 4.7.2, 4.7.1, 4.7, 4.6.2, 4.6.1, and 4.6 require that the d3dcompiler_47.dll update is installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll, see KB 4019990.

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.

Summary

Security improvements

There are no new security improvements in this release. This update is cumulative and contains all previously released security improvements.

Quality and reliability improvements

CLR1

- In scenarios with both high numbers of assemblies and high numbers of GC heaps, Server GC can encounter serious lock contention during generation 2 GCs.A config switch has been introduced as a workaround.It can either be enabled from a .config file:

<configuration>
  <runtime>
    <GCStaticsNoLock enabled="true"/>
  </runtime>
</configuration>

Or by setting environment variable COMPLUS_GCStaticsNoLockto a non-zero value.  If the config switch is not enabled, behavior is unchanged compared to previous versions.

1 Common Language Runtime (CLR)

Known issues in this update

Microsoft is not currently aware of any issues in this update.

Additional information about this update

The following articles contain additional information about this update as it relates to individual product versions.

  • 5004874 Description of the Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 and 4.6.2 for Windows Server 2008 SP2 (KB5004874)

  • 5004871 Description of the Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB5004871)

How to obtain and install the update

Before installing this update

Prerequisite:

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

You must install the updates listed below and restart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup and applying Microsoft security fixes.

  1. The March 12, 2019 servicing stack update (SSU) (KB4490628). To get the standalone package for this SSU, search for it in the Microsoft Update Catalog. This update is required to install updates that are only SHA-2 signed.

  2. The latest SHA-2 update (KB4474419) released September 10, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. This update is required to install updates that are only SHA-2 signed. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.

  3. The Extended Security Updates (ESU) Licensing Preparation Package (KB4538483) released February 11, 2020. The ESU licensing preparation package will be offered to you from WSUS. To get the standalone package for ESU licensing preparation package, search for it in the Microsoft Update Catalog.

Install this update

Release Channel

Available

Next Step

Windows Update and Microsoft Update

Yes

None. This update will be downloaded and installed automatically from Windows Update if you are an ESU customer.

Microsoft Update Catalog

Yes

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

Windows Server Update Services (WSUS)

Yes

This update will automatically sync with WSUS if you configure Products and Classifications as follows:

Product: Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1,Windows Embedded Standard 7 Service Pack 1, Windows Embedded POSReady 7

Classification: Updates

Update removal information

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

Update restart information

This update does not require a system restart after you apply it unless files that are being updated are locked or are being used.

Update replacement information

This update replaces previously released updates 5004229. 5004232.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.7.3771.0

35,704

29-Jun-2021

00:16

aspnet_wp.exe

4.7.3771.0

39,296

29-Jun-2021

00:16

clr.dll

4.7.3850.0

7,247,736

29-Jun-2021

00:26

clrjit.dll

4.7.3850.0

515,960

29-Jun-2021

00:26

dfdll.dll

4.7.3221.0

159,952

29-Jun-2021

00:16

GlobalUserInterface.CompositeFont

186,009

29-Jun-2021

00:16

mscordacwks.dll

4.7.3850.0

1,336,184

29-Jun-2021

00:26

mscordbi.dll

4.7.3850.0

1,162,120

29-Jun-2021

00:26

mscoreei.dll

4.7.3468.0

512,488

29-Jun-2021

00:16

mscorlib.dll

4.7.3850.0

5,638,520

29-Jun-2021

00:26

mscorsvc.dll

4.7.3771.0

424,824

29-Jun-2021

00:16

mscorsvw.exe

4.7.3771.0

100,800

29-Jun-2021

00:16

msvcp120_clr0400.dll

12.0.52519.0

485,576

29-Jun-2021

00:26

msvcr120_clr0400.dll

12.0.52519.0

987,840

29-Jun-2021

00:26

ngen.exe

4.7.3771.0

135,144

29-Jun-2021

00:16

VsVersion.dll

14.7.3835.0

12,176

29-Jun-2021

00:16

peverify.dll

4.7.3850.0

181,624

29-Jun-2021

00:26

PresentationCore.dll

4.7.3835.0

3,635,088

29-Jun-2021

00:16

PresentationFramework.dll

4.7.3835.0

6,257,528

29-Jun-2021

00:16

PresentationFramework-SystemData.dll

4.7.3835.0

17,272

29-Jun-2021

00:16

PresentationHost_v0400.dll

4.7.3835.0

207,240

29-Jun-2021

00:16

PresentationHost_v0400.dll.mui

4.7.3835.0

77,704

29-Jun-2021

00:16

PresentationNative_v0400.dll

4.7.3835.0

820,104

29-Jun-2021

00:16

ReachFramework.dll

4.7.3570.0

677,656

29-Jun-2021

00:16

ServiceMonikerSupport.dll

4.7.3620.0

30,192

29-Jun-2021

00:16

SMDiagnostics.dll

4.7.3620.0

74,840

29-Jun-2021

00:16

SMSvcHost.exe

4.7.3515.0

139,264

29-Jun-2021

00:16

SOS.dll

4.7.3850.0

736,632

29-Jun-2021

00:26

System.Speech.dll

4.7.3650.0

675,720

29-Jun-2021

00:16

System.Activities.dll

4.7.3620.0

1,534,008

29-Jun-2021

00:16

System.ComponentModel.DataAnnotations.dll

4.7.3221.0

127,400

29-Jun-2021

00:16

System.Core.dll

4.7.3835.0

1,544,984

29-Jun-2021

00:16

System.Data.Entity.dll

4.7.3221.0

4,035,664

29-Jun-2021

00:16

System.DirectoryServices.AccountManagement.dll

4.7.3221.0

297,648

29-Jun-2021

00:16

System.IdentityModel.dll

4.7.3620.0

1,095,736

29-Jun-2021

00:16

System.IdentityModel.Services.dll

4.7.3620.0

199,160

29-Jun-2021

00:16

System.Printing.dll

4.7.3570.0

374,032

29-Jun-2021

00:16

System.Runtime.Serialization.dll

4.7.3620.0

1,057,336

29-Jun-2021

00:16

System.ServiceModel.Channels.dll

4.7.3620.0

158,704

29-Jun-2021

00:16

System.ServiceModel.Discovery.dll

4.7.3620.0

309,232

29-Jun-2021

00:16

System.ServiceModel.dll

4.7.3620.0

6,324,792

29-Jun-2021

00:16

System.ServiceModel.Internals.dll

4.7.3620.0

261,688

29-Jun-2021

00:16

System.ServiceModel.Routing.dll

4.7.3221.0

132,208

29-Jun-2021

00:16

System.ServiceModel.WasHosting.dll

4.7.3620.0

40,944

29-Jun-2021

00:16

System.Web.ApplicationServices.dll

4.7.3771.0

63,768

29-Jun-2021

00:16

System.Web.Extensions.dll

4.7.3771.0

1,842,960

29-Jun-2021

00:16

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

29-Jun-2021

00:16

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

29-Jun-2021

00:16

System.Workflow.Runtime.dll

4.7.3570.0

499,480

29-Jun-2021

00:16

System.Runtime.Caching.dll

4.7.3221.0

109,864

29-Jun-2021

00:16

System.Configuration.dll

4.7.3630.0

420,512

29-Jun-2021

00:16

System.Data.dll

4.7.3730.0

3,464,568

29-Jun-2021

00:16

System.Data.SqlXml.dll

4.7.3221.0

734,520

29-Jun-2021

00:16

System.Deployment.dll

4.7.3221.0

879,408

29-Jun-2021

00:16

System.DirectoryServices.Protocols.dll

4.7.3221.0

201,624

29-Jun-2021

00:16

System.dll

4.7.3650.0

3,556,616

29-Jun-2021

00:16

System.Drawing.dll

4.7.3221.0

600,864

29-Jun-2021

00:16

System.Management.dll

4.7.3221.0

415,536

29-Jun-2021

00:16

System.Net.Http.dll

4.7.3221.0

204,584

29-Jun-2021

00:16

System.Runtime.Remoting.dll

4.7.3221.0

347,472

29-Jun-2021

00:16

System.Security.dll

4.7.3701.0

318,712

29-Jun-2021

00:16

System.Transactions.dll

4.7.3221.0

309,328

29-Jun-2021

00:16

System.Web.dll

4.7.3771.0

5,409,680

29-Jun-2021

00:16

System.Windows.Controls.Ribbon.dll

4.7.3835.0

739,192

29-Jun-2021

00:16

System.Windows.Forms.dll

4.7.3835.0

5,235,480

29-Jun-2021

00:16

System.Xaml.dll

4.7.3835.0

635,168

29-Jun-2021

00:16

System.Xml.dll

4.7.3221.0

2,670,344

29-Jun-2021

00:16

UIAutomationClient.dll

4.7.3835.0

170,872

29-Jun-2021

00:16

UIAutomationClientsideProviders.dll

4.7.3835.0

354,168

29-Jun-2021

00:16

UIAutomationProvider.dll

4.7.3835.0

41,848

29-Jun-2021

00:16

UIAutomationTypes.dll

4.7.3835.0

213,880

29-Jun-2021

00:16

webengine.dll

4.7.3771.0

17,784

29-Jun-2021

00:16

webengine4.dll

4.7.3771.0

543,120

29-Jun-2021

00:16

WindowsBase.dll

4.7.3835.0

1,289,104

29-Jun-2021

00:16

WMINet_Utils.dll

4.7.3221.0

136,432

29-Jun-2021

00:16

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

29-Jun-2021

00:16

WPFFontCache_v0400.exe.mui

4.7.3835.0

12,168

29-Jun-2021

00:16

WPFFontCache_v0400.exe

4.7.3835.0

18,848

29-Jun-2021

00:16

wpfgfx_v0400.dll

4.7.3835.0

1,338,760

29-Jun-2021

00:16

Placeholder.dll

4.7.3835.0

17,800

29-Jun-2021

00:16

PenIMC2_v0400.dll

4.7.3835.0

79,240

29-Jun-2021

00:16

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.7.3771.0

39,312

29-Jun-2021

00:16

Aspnet_perf.dll

4.7.3771.0

35,704

29-Jun-2021

00:16

aspnet_wp.exe

4.7.3771.0

43,928

29-Jun-2021

00:16

aspnet_wp.exe

4.7.3771.0

39,296

29-Jun-2021

00:16

clr.dll

4.7.3850.0

10,367,880

29-Jun-2021

00:16

clr.dll

4.7.3850.0

7,247,736

29-Jun-2021

00:26

clrjit.dll

4.7.3850.0

1,214,352

29-Jun-2021

00:16

clrjit.dll

4.7.3850.0

515,960

29-Jun-2021

00:26

compatjit.dll

4.7.3850.0

1,252,744

29-Jun-2021

00:16

dfdll.dll

4.7.3221.0

191,696

29-Jun-2021

00:16

dfdll.dll

4.7.3221.0

159,952

29-Jun-2021

00:16

GlobalUserInterface.CompositeFont

186,009

29-Jun-2021

00:16

mscordacwks.dll

4.7.3850.0

1,833,864

29-Jun-2021

00:16

mscordacwks.dll

4.7.3850.0

1,336,184

29-Jun-2021

00:26

mscordbi.dll

4.7.3850.0

1,615,248

29-Jun-2021

00:16

mscordbi.dll

4.7.3850.0

1,162,120

29-Jun-2021

00:26

mscoreei.dll

4.7.3468.0

631,272

29-Jun-2021

00:16

mscoreei.dll

4.7.3468.0

512,488

29-Jun-2021

00:16

mscorlib.dll

4.7.3850.0

5,420,432

29-Jun-2021

00:16

mscorlib.dll

4.7.3850.0

5,638,520

29-Jun-2021

00:26

mscorsvc.dll

4.7.3771.0

538,000

29-Jun-2021

00:16

mscorsvc.dll

4.7.3771.0

424,824

29-Jun-2021

00:16

mscorsvw.exe

4.7.3771.0

121,768

29-Jun-2021

00:16

mscorsvw.exe

4.7.3771.0

100,800

29-Jun-2021

00:16

msvcp120_clr0400.dll

12.0.52519.0

690,008

29-Jun-2021

00:16

msvcp120_clr0400.dll

12.0.52519.0

485,576

29-Jun-2021

00:26

msvcr120_clr0400.dll

12.0.52519.0

993,632

29-Jun-2021

00:16

msvcr120_clr0400.dll

12.0.52519.0

987,840

29-Jun-2021

00:26

ngen.exe

4.7.3771.0

167,400

29-Jun-2021

00:16

ngen.exe

4.7.3771.0

135,144

29-Jun-2021

00:16

VsVersion.dll

14.7.3835.0

12,176

29-Jun-2021

00:16

VsVersion.dll

14.7.3835.0

12,176

29-Jun-2021

00:16

peverify.dll

4.7.3850.0

253,832

29-Jun-2021

00:16

peverify.dll

4.7.3850.0

181,624

29-Jun-2021

00:26

PresentationCore.dll

4.7.3835.0

3,613,056

29-Jun-2021

00:16

PresentationCore.dll

4.7.3835.0

3,635,088

29-Jun-2021

00:16

PresentationFramework.dll

4.7.3835.0

6,257,528

29-Jun-2021

00:16

PresentationFramework-SystemData.dll

4.7.3835.0

17,272

29-Jun-2021

00:16

PresentationHost_v0400.dll

4.7.3835.0

270,736

29-Jun-2021

00:16

PresentationHost_v0400.dll.mui

4.7.3835.0

77,712

29-Jun-2021

00:16

PresentationHost_v0400.dll

4.7.3835.0

207,240

29-Jun-2021

00:16

PresentationHost_v0400.dll.mui

4.7.3835.0

77,704

29-Jun-2021

00:16

PresentationNative_v0400.dll

4.7.3835.0

1,102,736

29-Jun-2021

00:16

PresentationNative_v0400.dll

4.7.3835.0

820,104

29-Jun-2021

00:16

ReachFramework.dll

4.7.3570.0

677,656

29-Jun-2021

00:16

ServiceMonikerSupport.dll

4.7.3620.0

32,240

29-Jun-2021

00:16

ServiceMonikerSupport.dll

4.7.3620.0

30,192

29-Jun-2021

00:16

SMDiagnostics.dll

4.7.3620.0

74,840

29-Jun-2021

00:16

SMSvcHost.exe

4.7.3515.0

139,264

29-Jun-2021

00:16

SOS.dll

4.7.3850.0

865,160

29-Jun-2021

00:16

SOS.dll

4.7.3850.0

736,632

29-Jun-2021

00:26

System.Speech.dll

4.7.3650.0

675,720

29-Jun-2021

00:16

System.Activities.dll

4.7.3620.0

1,534,008

29-Jun-2021

00:16

System.ComponentModel.DataAnnotations.dll

4.7.3221.0

127,400

29-Jun-2021

00:16

System.Core.dll

4.7.3835.0

1,544,984

29-Jun-2021

00:16

System.Data.Entity.dll

4.7.3221.0

4,035,664

29-Jun-2021

00:16

System.DirectoryServices.AccountManagement.dll

4.7.3221.0

297,648

29-Jun-2021

00:16

System.IdentityModel.dll

4.7.3620.0

1,095,736

29-Jun-2021

00:16

System.IdentityModel.Services.dll

4.7.3620.0

199,160

29-Jun-2021

00:16

System.Printing.dll

4.7.3570.0

374,552

29-Jun-2021

00:16

System.Printing.dll

4.7.3570.0

374,032

29-Jun-2021

00:16

System.Runtime.Serialization.dll

4.7.3620.0

1,057,336

29-Jun-2021

00:16

System.ServiceModel.Channels.dll

4.7.3620.0

158,704

29-Jun-2021

00:16

System.ServiceModel.Discovery.dll

4.7.3620.0

309,232

29-Jun-2021

00:16

System.ServiceModel.dll

4.7.3620.0

6,324,792

29-Jun-2021

00:16

System.ServiceModel.Internals.dll

4.7.3620.0

261,688

29-Jun-2021

00:16

System.ServiceModel.Routing.dll

4.7.3221.0

132,208

29-Jun-2021

00:16

System.ServiceModel.WasHosting.dll

4.7.3620.0

40,944

29-Jun-2021

00:16

System.Web.ApplicationServices.dll

4.7.3771.0

63,768

29-Jun-2021

00:16

System.Web.Extensions.dll

4.7.3771.0

1,842,960

29-Jun-2021

00:16

System.Workflow.Activities.dll

4.7.3570.0

1,052,136

29-Jun-2021

00:16

System.Workflow.ComponentModel.dll

4.7.3570.0

1,553,896

29-Jun-2021

00:16

System.Workflow.Runtime.dll

4.7.3570.0

499,480

29-Jun-2021

00:16

System.Runtime.Caching.dll

4.7.3221.0

109,864

29-Jun-2021

00:16

System.configuration.dll

4.7.3630.0

420,512

29-Jun-2021

00:16

System.Data.dll

4.7.3730.0

3,526,536

29-Jun-2021

00:16

System.Data.dll

4.7.3730.0

3,464,568

29-Jun-2021

00:16

System.Data.SqlXml.dll

4.7.3221.0

734,520

29-Jun-2021

00:16

System.Deployment.dll

4.7.3221.0

879,408

29-Jun-2021

00:16

System.DirectoryServices.Protocols.dll

4.7.3221.0

201,624

29-Jun-2021

00:16

System.dll

4.7.3650.0

3,556,616

29-Jun-2021

00:16

System.Drawing.dll

4.7.3221.0

600,864

29-Jun-2021

00:16

System.Management.dll

4.7.3221.0

415,536

29-Jun-2021

00:16

System.Net.Http.dll

4.7.3221.0

204,584

29-Jun-2021

00:16

System.Runtime.Remoting.dll

4.7.3221.0

347,472

29-Jun-2021

00:16

System.Security.dll

4.7.3701.0

318,712

29-Jun-2021

00:16

System.Transactions.dll

4.7.3221.0

311,048

29-Jun-2021

00:16

System.Transactions.dll

4.7.3221.0

309,328

29-Jun-2021

00:16

System.Web.dll

4.7.3771.0

5,392,760

29-Jun-2021

00:16

System.Web.dll

4.7.3771.0

5,409,680

29-Jun-2021

00:16

System.Windows.Controls.Ribbon.dll

4.7.3835.0

739,192

29-Jun-2021

00:16

System.Windows.Forms.dll

4.7.3835.0

5,235,480

29-Jun-2021

00:16

System.Xaml.dll

4.7.3835.0

635,168

29-Jun-2021

00:16

System.XML.dll

4.7.3221.0

2,670,344

29-Jun-2021

00:16

UIAutomationClient.dll

4.7.3835.0

170,872

29-Jun-2021

00:16

UIAutomationClientsideProviders.dll

4.7.3835.0

354,168

29-Jun-2021

00:16

UIAutomationProvider.dll

4.7.3835.0

41,848

29-Jun-2021

00:16

UIAutomationTypes.dll

4.7.3835.0

213,880

29-Jun-2021

00:16

webengine.dll

4.7.3771.0

19,344

29-Jun-2021

00:16

webengine.dll

4.7.3771.0

17,784

29-Jun-2021

00:16

webengine4.dll

4.7.3771.0

660,368

29-Jun-2021

00:16

webengine4.dll

4.7.3771.0

543,120

29-Jun-2021

00:16

WindowsBase.dll

4.7.3835.0

1,289,104

29-Jun-2021

00:16

WMINet_Utils.dll

4.7.3221.0

188,144

29-Jun-2021

00:16

WMINet_Utils.dll

4.7.3221.0

136,432

29-Jun-2021

00:16

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

101,656

29-Jun-2021

00:16

WorkflowServiceHostPerformanceCounters.dll

4.7.3570.0

89,880

29-Jun-2021

00:16

WPFFontCache_v0400.exe.mui

4.7.3835.0

12,160

29-Jun-2021

00:16

WPFFontCache_v0400.exe.mui

4.7.3835.0

12,168

29-Jun-2021

00:16

WPFFontCache_v0400.exe

4.7.3835.0

19,856

29-Jun-2021

00:16

WPFFontCache_v0400.exe

4.7.3835.0

18,848

29-Jun-2021

00:16

wpfgfx_v0400.dll

4.7.3835.0

1,758,600

29-Jun-2021

00:16

wpfgfx_v0400.dll

4.7.3835.0

1,338,760

29-Jun-2021

00:16

Placeholder.dll

4.7.3835.0

18,816

29-Jun-2021

00:16

Placeholder.dll

4.7.3835.0

17,800

29-Jun-2021

00:16

PenIMC2_v0400.dll

4.7.3835.0

97,656

29-Jun-2021

00:16

PenIMC2_v0400.dll

4.7.3835.0

79,240

29-Jun-2021

00:16

Information about protection and security

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