Applies to:

Microsoft .NET Framework 4.8

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.

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.

Winforms

- Addresses an issue where some Windows Forms applications that use ToolStrip controls with ToolStripControlHost, and run under UIA Accessibility Tools, could make Accessibility Tools unresponsive.

- Addresses a regression in the ComboBox item accessible object where Accessibility Tools was not able to distinguish between identical items in the ComboBox and was becoming unresponsive.

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.

  • 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 4.8 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.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

36,216

29-Jun-2021

01:11

aspnet_wp.exe

4.8.4331.0

39,808

29-Jun-2021

01:11

clr.dll

4.8.4410.0

8,040,328

29-Jun-2021

01:31

clrjit.dll

4.8.4410.0

554,888

29-Jun-2021

01:31

dfdll.dll

4.8.4290.0

178,040

29-Jun-2021

01:11

mscordacwks.dll

4.8.4410.0

1,307,512

29-Jun-2021

01:31

mscordbi.dll

4.8.4410.0

1,188,728

29-Jun-2021

01:31

mscoreei.dll

4.8.4180.0

581,920

29-Jun-2021

01:11

mscorlib.dll

4.8.4410.0

5,670,776

29-Jun-2021

01:31

mscorsvc.dll

4.8.4331.0

454,032

29-Jun-2021

01:11

mscorsvw.exe

4.8.4331.0

125,880

29-Jun-2021

01:11

ngen.exe

4.8.4331.0

144,360

29-Jun-2021

01:11

Placeholder.dll

4.8.4395.0

18,296

29-Jun-2021

01:11

VsVersion.dll

14.8.4395.0

11,656

29-Jun-2021

01:11

PenIMC2_v0400.dll

4.8.4395.0

99,704

29-Jun-2021

01:11

peverify.dll

4.8.4410.0

182,648

29-Jun-2021

01:31

PresentationCore.dll

4.8.4395.0

3,674,496

29-Jun-2021

01:11

PresentationFramework.dll

4.8.4395.0

6,283,640

29-Jun-2021

01:11

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

29-Jun-2021

01:11

PresentationHost_v0400.dll

4.8.4395.0

233,848

29-Jun-2021

01:11

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

29-Jun-2021

01:11

PresentationNative_v0400.dll

4.8.4395.0

923,000

29-Jun-2021

01:11

ReachFramework.dll

4.8.4110.0

677,656

29-Jun-2021

01:11

ServiceMonikerSupport.dll

4.8.4261.0

24,456

29-Jun-2021

01:11

SMDiagnostics.dll

4.8.4261.0

66,328

29-Jun-2021

01:11

SOS.dll

4.8.4410.0

767,352

29-Jun-2021

01:31

System.Speech.dll

4.8.4210.0

676,736

29-Jun-2021

01:11

System.Activities.dll

4.8.4261.0

1,526,528

29-Jun-2021

01:11

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

29-Jun-2021

01:11

System.Core.dll

4.8.4395.0

1,549,080

29-Jun-2021

01:11

System.IdentityModel.dll

4.8.4261.0

1,086,744

29-Jun-2021

01:11

System.IdentityModel.Services.dll

4.8.4261.0

191,352

29-Jun-2021

01:11

System.Printing.dll

4.8.4110.0

399,640

29-Jun-2021

01:11

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

29-Jun-2021

01:11

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

29-Jun-2021

01:11

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

29-Jun-2021

01:11

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

29-Jun-2021

01:11

System.ServiceModel.dll

4.8.4261.0

6,383,896

29-Jun-2021

01:11

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

29-Jun-2021

01:11

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

29-Jun-2021

01:11

System.ServiceModel.Web.dll

4.8.4261.0

321,792

29-Jun-2021

01:11

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

29-Jun-2021

01:11

System.Web.Extensions.dll

4.8.4331.0

1,842,448

29-Jun-2021

01:11

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

29-Jun-2021

01:11

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

29-Jun-2021

01:11

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

29-Jun-2021

01:11

System.Workflow.Runtime.dll

4.8.4110.0

503,064

29-Jun-2021

01:11

System.Configuration.dll

4.8.4190.0

421,536

29-Jun-2021

01:11

System.Data.dll

4.8.4290.0

3,476,360

29-Jun-2021

01:11

System.Deployment.dll

4.8.4290.0

1,593,624

29-Jun-2021

01:11

System.dll

4.8.4380.0

3,554,584

29-Jun-2021

01:11

System.Drawing.Design.dll

4.8.4210.0

125,192

29-Jun-2021

01:11

System.Drawing.dll

4.8.4395.0

595,728

29-Jun-2021

01:11

System.Security.dll

4.8.4261.0

320,280

29-Jun-2021

01:11

System.Web.dll

4.8.4331.0

5,410,192

29-Jun-2021

01:11

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

29-Jun-2021

01:11

System.Windows.Forms.dll

4.8.4410.0

5,918,488

29-Jun-2021

01:11

System.Xaml.dll

4.8.4395.0

632,104

29-Jun-2021

01:11

UIAutomationClient.dll

4.8.4395.0

170,872

29-Jun-2021

01:11

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

29-Jun-2021

01:11

UIAutomationProvider.dll

4.8.4395.0

41,848

29-Jun-2021

01:11

UIAutomationTypes.dll

4.8.4395.0

215,928

29-Jun-2021

01:11

webengine.dll

4.8.4331.0

19,344

29-Jun-2021

01:11

webengine4.dll

4.8.4331.0

564,624

29-Jun-2021

01:11

WindowsBase.dll

4.8.4395.0

1,298,808

29-Jun-2021

01:11

WindowsFormsIntegration.dll

4.8.4180.0

105,248

29-Jun-2021

01:11

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

29-Jun-2021

01:11

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

29-Jun-2021

01:11

WPFFontCache_v0400.exe

4.8.4395.0

19,880

29-Jun-2021

01:11

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

29-Jun-2021

01:11

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

41,872

29-Jun-2021

01:11

Aspnet_perf.dll

4.8.4331.0

36,216

29-Jun-2021

01:11

aspnet_wp.exe

4.8.4331.0

45,440

29-Jun-2021

01:11

aspnet_wp.exe

4.8.4331.0

39,808

29-Jun-2021

01:11

clr.dll

4.8.4410.0

11,244,424

29-Jun-2021

01:11

clr.dll

4.8.4410.0

8,040,328

29-Jun-2021

01:31

clrjit.dll

4.8.4410.0

1,358,200

29-Jun-2021

01:11

clrjit.dll

4.8.4410.0

554,888

29-Jun-2021

01:31

compatjit.dll

4.8.4410.0

1,273,224

29-Jun-2021

01:11

dfdll.dll

4.8.4290.0

214,920

29-Jun-2021

01:11

dfdll.dll

4.8.4290.0

178,040

29-Jun-2021

01:11

mscordacwks.dll

4.8.4410.0

1,801,080

29-Jun-2021

01:11

mscordacwks.dll

4.8.4410.0

1,307,512

29-Jun-2021

01:31

mscordbi.dll

4.8.4410.0

1,655,160

29-Jun-2021

01:11

mscordbi.dll

4.8.4410.0

1,188,728

29-Jun-2021

01:31

mscoreei.dll

4.8.4180.0

689,952

29-Jun-2021

01:11

mscoreei.dll

4.8.4180.0

581,920

29-Jun-2021

01:11

mscorlib.dll

4.8.4410.0

5,431,672

29-Jun-2021

01:11

mscorlib.dll

4.8.4410.0

5,670,776

29-Jun-2021

01:31

mscorsvc.dll

4.8.4331.0

557,944

29-Jun-2021

01:11

mscorsvc.dll

4.8.4331.0

454,032

29-Jun-2021

01:11

mscorsvw.exe

4.8.4331.0

152,000

29-Jun-2021

01:11

mscorsvw.exe

4.8.4331.0

125,880

29-Jun-2021

01:11

ngen.exe

4.8.4331.0

174,568

29-Jun-2021

01:11

ngen.exe

4.8.4331.0

144,360

29-Jun-2021

01:11

VsVersion.dll

14.8.4395.0

11,648

29-Jun-2021

01:11

Placeholder.dll

4.8.4395.0

20,360

29-Jun-2021

01:11

Placeholder.dll

4.8.4395.0

18,296

29-Jun-2021

01:11

VsVersion.dll

14.8.4395.0

11,656

29-Jun-2021

01:11

PenIMC2_v0400.dll

4.8.4395.0

120,712

29-Jun-2021

01:11

PenIMC2_v0400.dll

4.8.4395.0

99,704

29-Jun-2021

01:11

peverify.dll

4.8.4410.0

265,592

29-Jun-2021

01:11

peverify.dll

4.8.4410.0

182,648

29-Jun-2021

01:31

PresentationCore.dll

4.8.4395.0

3,650,952

29-Jun-2021

01:11

PresentationCore.dll

4.8.4395.0

3,674,496

29-Jun-2021

01:11

PresentationFramework.dll

4.8.4395.0

6,283,640

29-Jun-2021

01:11

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

29-Jun-2021

01:11

PresentationHost_v0400.dll

4.8.4395.0

302,472

29-Jun-2021

01:11

PresentationHost_v0400.dll.mui

4.8.4395.0

77,712

29-Jun-2021

01:11

PresentationHost_v0400.dll

4.8.4395.0

233,848

29-Jun-2021

01:11

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

29-Jun-2021

01:11

PresentationNative_v0400.dll

4.8.4395.0

1,164,176

29-Jun-2021

01:11

PresentationNative_v0400.dll

4.8.4395.0

923,000

29-Jun-2021

01:11

ReachFramework.dll

4.8.4110.0

677,656

29-Jun-2021

01:11

ServiceMonikerSupport.dll

4.8.4261.0

27,512

29-Jun-2021

01:11

ServiceMonikerSupport.dll

4.8.4261.0

24,456

29-Jun-2021

01:11

SMDiagnostics.dll

4.8.4261.0

66,328

29-Jun-2021

01:11

SOS.dll

4.8.4410.0

921,464

29-Jun-2021

01:11

SOS.dll

4.8.4410.0

767,352

29-Jun-2021

01:31

System.Speech.dll

4.8.4210.0

676,736

29-Jun-2021

01:11

System.Activities.dll

4.8.4261.0

1,526,528

29-Jun-2021

01:11

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

29-Jun-2021

01:11

System.Core.dll

4.8.4395.0

1,549,080

29-Jun-2021

01:11

System.IdentityModel.dll

4.8.4261.0

1,086,744

29-Jun-2021

01:11

System.IdentityModel.Services.dll

4.8.4261.0

191,352

29-Jun-2021

01:11

System.Printing.dll

4.8.4110.0

400,152

29-Jun-2021

01:11

System.Printing.dll

4.8.4110.0

399,640

29-Jun-2021

01:11

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

29-Jun-2021

01:11

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

29-Jun-2021

01:11

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

29-Jun-2021

01:11

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

29-Jun-2021

01:11

System.ServiceModel.dll

4.8.4261.0

6,383,896

29-Jun-2021

01:11

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

29-Jun-2021

01:11

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

29-Jun-2021

01:11

System.ServiceModel.Web.dll

4.8.4261.0

321,792

29-Jun-2021

01:11

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

29-Jun-2021

01:11

System.Web.Extensions.dll

4.8.4331.0

1,842,448

29-Jun-2021

01:11

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

29-Jun-2021

01:11

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

29-Jun-2021

01:11

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

29-Jun-2021

01:11

System.Workflow.Runtime.dll

4.8.4110.0

503,064

29-Jun-2021

01:11

System.configuration.dll

4.8.4190.0

421,536

29-Jun-2021

01:11

System.Data.dll

4.8.4290.0

3,543,432

29-Jun-2021

01:11

System.Data.dll

4.8.4290.0

3,476,360

29-Jun-2021

01:11

System.Deployment.dll

4.8.4290.0

1,593,624

29-Jun-2021

01:11

System.dll

4.8.4380.0

3,554,584

29-Jun-2021

01:11

System.Drawing.Design.dll

4.8.4210.0

125,192

29-Jun-2021

01:11

System.Drawing.dll

4.8.4395.0

595,728

29-Jun-2021

01:11

System.Security.dll

4.8.4261.0

320,280

29-Jun-2021

01:11

System.Web.dll

4.8.4331.0

5,397,904

29-Jun-2021

01:11

System.Web.dll

4.8.4331.0

5,410,192

29-Jun-2021

01:11

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

29-Jun-2021

01:11

System.Windows.Forms.dll

4.8.4410.0

5,918,488

29-Jun-2021

01:11

System.Xaml.dll

4.8.4395.0

632,104

29-Jun-2021

01:11

UIAutomationClient.dll

4.8.4395.0

170,872

29-Jun-2021

01:11

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

29-Jun-2021

01:11

UIAutomationProvider.dll

4.8.4395.0

41,848

29-Jun-2021

01:11

UIAutomationTypes.dll

4.8.4395.0

215,928

29-Jun-2021

01:11

webengine.dll

4.8.4331.0

21,368

29-Jun-2021

01:11

webengine.dll

4.8.4331.0

19,344

29-Jun-2021

01:11

webengine4.dll

4.8.4331.0

675,192

29-Jun-2021

01:11

webengine4.dll

4.8.4331.0

564,624

29-Jun-2021

01:11

WindowsBase.dll

4.8.4395.0

1,298,808

29-Jun-2021

01:11

WindowsFormsIntegration.dll

4.8.4180.0

105,248

29-Jun-2021

01:11

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

29-Jun-2021

01:11

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

29-Jun-2021

01:11

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,168

29-Jun-2021

01:11

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

29-Jun-2021

01:11

WPFFontCache_v0400.exe

4.8.4395.0

21,920

29-Jun-2021

01:11

WPFFontCache_v0400.exe

4.8.4395.0

19,880

29-Jun-2021

01:11

wpfgfx_v0400.dll

4.8.4395.0

2,050,448

29-Jun-2021

01:11

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

29-Jun-2021

01:11

Information about protection and security

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