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

- Addresses a crash that could occur if a program exits while a ManagementEventWatcher is active.

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.

  • 5007299 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 (KB5007299)

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.

Windows Update for Business

No

None. These changes will be included in the next security update to this channel. For more information about Windows Update for Business go to the Windows Update for Business 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 5006761.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

36,216

05-Oct-2021

22:48

aspnet_wp.exe

4.8.4331.0

39,808

05-Oct-2021

22:48

clr.dll

4.8.4430.0

8,040,312

05-Oct-2021

22:48

clrjit.dll

4.8.4430.0

554,872

05-Oct-2021

22:48

dfdll.dll

4.8.4290.0

178,040

05-Oct-2021

22:48

mscordacwks.dll

4.8.4430.0

1,307,528

05-Oct-2021

22:48

mscordbi.dll

4.8.4430.0

1,188,728

05-Oct-2021

22:48

mscoreei.dll

4.8.4180.0

581,920

05-Oct-2021

22:48

mscorlib.dll

4.8.4430.0

5,670,776

05-Oct-2021

22:48

mscorsvc.dll

4.8.4331.0

454,032

05-Oct-2021

22:48

mscorsvw.exe

4.8.4331.0

125,880

05-Oct-2021

22:48

ngen.exe

4.8.4331.0

144,360

05-Oct-2021

22:48

Placeholder.dll

4.8.4395.0

18,296

05-Oct-2021

22:48

VsVersion.dll

14.8.4395.0

11,656

05-Oct-2021

22:48

PenIMC2_v0400.dll

4.8.4395.0

99,704

05-Oct-2021

22:48

peverify.dll

4.8.4430.0

182,664

05-Oct-2021

22:48

PresentationCore.dll

4.8.4395.0

3,674,496

05-Oct-2021

22:48

PresentationFramework.dll

4.8.4395.0

6,283,640

05-Oct-2021

22:48

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

05-Oct-2021

22:48

PresentationHost_v0400.dll

4.8.4395.0

233,848

05-Oct-2021

22:48

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

05-Oct-2021

22:48

PresentationNative_v0400.dll

4.8.4395.0

923,000

05-Oct-2021

22:48

ReachFramework.dll

4.8.4110.0

677,656

05-Oct-2021

22:48

ServiceMonikerSupport.dll

4.8.4261.0

24,456

05-Oct-2021

22:48

SMDiagnostics.dll

4.8.4261.0

66,328

05-Oct-2021

22:48

SOS.dll

4.8.4430.0

767,352

05-Oct-2021

22:48

System.Speech.dll

4.8.4210.0

676,736

05-Oct-2021

22:48

System.Activities.dll

4.8.4261.0

1,526,528

05-Oct-2021

22:48

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

05-Oct-2021

22:48

System.Core.dll

4.8.4395.0

1,549,080

05-Oct-2021

22:48

System.IdentityModel.dll

4.8.4261.0

1,086,744

05-Oct-2021

22:48

System.IdentityModel.Services.dll

4.8.4261.0

191,352

05-Oct-2021

22:48

System.Printing.dll

4.8.4110.0

399,640

05-Oct-2021

22:48

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

05-Oct-2021

22:48

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

05-Oct-2021

22:48

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

05-Oct-2021

22:48

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

05-Oct-2021

22:48

System.ServiceModel.dll

4.8.4261.0

6,383,896

05-Oct-2021

22:48

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

05-Oct-2021

22:48

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

05-Oct-2021

22:48

System.ServiceModel.Web.dll

4.8.4261.0

321,792

05-Oct-2021

22:48

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

05-Oct-2021

22:48

System.Web.Extensions.dll

4.8.4331.0

1,842,448

05-Oct-2021

22:48

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

05-Oct-2021

22:48

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

05-Oct-2021

22:48

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

05-Oct-2021

22:48

System.Workflow.Runtime.dll

4.8.4110.0

503,064

05-Oct-2021

22:48

System.Configuration.dll

4.8.4190.0

421,536

05-Oct-2021

22:48

System.Data.dll

4.8.4290.0

3,476,360

05-Oct-2021

22:48

System.Deployment.dll

4.8.4290.0

1,593,624

05-Oct-2021

22:48

System.dll

4.8.4380.0

3,554,584

05-Oct-2021

22:48

System.Drawing.Design.dll

4.8.4210.0

125,192

05-Oct-2021

22:48

System.Drawing.dll

4.8.4395.0

595,728

05-Oct-2021

22:48

System.Management.dll

4.8.4450.0

408,856

05-Oct-2021

22:48

System.Security.dll

4.8.4261.0

320,280

05-Oct-2021

22:48

System.Web.dll

4.8.4331.0

5,410,192

05-Oct-2021

22:48

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

05-Oct-2021

22:48

System.Windows.Forms.dll

4.8.4410.0

5,918,488

05-Oct-2021

22:48

System.Xaml.dll

4.8.4395.0

632,104

05-Oct-2021

22:48

UIAutomationClient.dll

4.8.4395.0

170,872

05-Oct-2021

22:48

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

05-Oct-2021

22:48

UIAutomationProvider.dll

4.8.4395.0

41,848

05-Oct-2021

22:48

UIAutomationTypes.dll

4.8.4395.0

215,928

05-Oct-2021

22:48

webengine.dll

4.8.4331.0

19,344

05-Oct-2021

22:48

webengine4.dll

4.8.4331.0

564,624

05-Oct-2021

22:48

WindowsBase.dll

4.8.4395.0

1,298,808

05-Oct-2021

22:48

WindowsFormsIntegration.dll

4.8.4180.0

105,248

05-Oct-2021

22:48

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

05-Oct-2021

22:48

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

05-Oct-2021

22:48

WPFFontCache_v0400.exe

4.8.4395.0

19,880

05-Oct-2021

22:48

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

05-Oct-2021

22:48

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

41,872

05-Oct-2021

22:48

Aspnet_perf.dll

4.8.4331.0

36,216

05-Oct-2021

22:48

aspnet_wp.exe

4.8.4331.0

45,440

05-Oct-2021

22:48

aspnet_wp.exe

4.8.4331.0

39,808

05-Oct-2021

22:48

clr.dll

4.8.4430.0

11,243,384

05-Oct-2021

22:48

clr.dll

4.8.4430.0

8,040,312

05-Oct-2021

22:48

clrjit.dll

4.8.4430.0

1,358,200

05-Oct-2021

22:48

clrjit.dll

4.8.4430.0

554,872

05-Oct-2021

22:48

compatjit.dll

4.8.4430.0

1,273,208

05-Oct-2021

22:48

dfdll.dll

4.8.4290.0

214,920

05-Oct-2021

22:48

dfdll.dll

4.8.4290.0

178,040

05-Oct-2021

22:48

mscordacwks.dll

4.8.4430.0

1,801,080

05-Oct-2021

22:48

mscordacwks.dll

4.8.4430.0

1,307,528

05-Oct-2021

22:48

mscordbi.dll

4.8.4430.0

1,655,160

05-Oct-2021

22:48

mscordbi.dll

4.8.4430.0

1,188,728

05-Oct-2021

22:48

mscoreei.dll

4.8.4180.0

689,952

05-Oct-2021

22:48

mscoreei.dll

4.8.4180.0

581,920

05-Oct-2021

22:48

mscorlib.dll

4.8.4430.0

5,431,696

05-Oct-2021

22:48

mscorlib.dll

4.8.4430.0

5,670,776

05-Oct-2021

22:48

mscorsvc.dll

4.8.4331.0

557,944

05-Oct-2021

22:48

mscorsvc.dll

4.8.4331.0

454,032

05-Oct-2021

22:48

mscorsvw.exe

4.8.4331.0

152,000

05-Oct-2021

22:48

mscorsvw.exe

4.8.4331.0

125,880

05-Oct-2021

22:48

ngen.exe

4.8.4331.0

174,568

05-Oct-2021

22:48

ngen.exe

4.8.4331.0

144,360

05-Oct-2021

22:48

VsVersion.dll

14.8.4395.0

11,648

05-Oct-2021

22:48

Placeholder.dll

4.8.4395.0

20,360

05-Oct-2021

22:48

Placeholder.dll

4.8.4395.0

18,296

05-Oct-2021

22:48

VsVersion.dll

14.8.4395.0

11,656

05-Oct-2021

22:48

PenIMC2_v0400.dll

4.8.4395.0

120,712

05-Oct-2021

22:48

PenIMC2_v0400.dll

4.8.4395.0

99,704

05-Oct-2021

22:48

peverify.dll

4.8.4430.0

265,592

05-Oct-2021

22:48

peverify.dll

4.8.4430.0

182,664

05-Oct-2021

22:48

PresentationCore.dll

4.8.4395.0

3,650,952

05-Oct-2021

22:48

PresentationCore.dll

4.8.4395.0

3,674,496

05-Oct-2021

22:48

PresentationFramework.dll

4.8.4395.0

6,283,640

05-Oct-2021

22:48

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

05-Oct-2021

22:48

PresentationHost_v0400.dll

4.8.4395.0

302,472

05-Oct-2021

22:48

PresentationHost_v0400.dll.mui

4.8.4395.0

77,712

05-Oct-2021

22:48

PresentationHost_v0400.dll

4.8.4395.0

233,848

05-Oct-2021

22:48

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

05-Oct-2021

22:48

PresentationNative_v0400.dll

4.8.4395.0

1,164,176

05-Oct-2021

22:48

PresentationNative_v0400.dll

4.8.4395.0

923,000

05-Oct-2021

22:48

ReachFramework.dll

4.8.4110.0

677,656

05-Oct-2021

22:48

ServiceMonikerSupport.dll

4.8.4261.0

27,512

05-Oct-2021

22:48

ServiceMonikerSupport.dll

4.8.4261.0

24,456

05-Oct-2021

22:48

SMDiagnostics.dll

4.8.4261.0

66,328

05-Oct-2021

22:48

SOS.dll

4.8.4430.0

921,480

05-Oct-2021

22:48

SOS.dll

4.8.4430.0

767,352

05-Oct-2021

22:48

System.Speech.dll

4.8.4210.0

676,736

05-Oct-2021

22:48

System.Activities.dll

4.8.4261.0

1,526,528

05-Oct-2021

22:48

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

05-Oct-2021

22:48

System.Core.dll

4.8.4395.0

1,549,080

05-Oct-2021

22:48

System.IdentityModel.dll

4.8.4261.0

1,086,744

05-Oct-2021

22:48

System.IdentityModel.Services.dll

4.8.4261.0

191,352

05-Oct-2021

22:48

System.Printing.dll

4.8.4110.0

400,152

05-Oct-2021

22:48

System.Printing.dll

4.8.4110.0

399,640

05-Oct-2021

22:48

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

05-Oct-2021

22:48

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

05-Oct-2021

22:48

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

05-Oct-2021

22:48

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

05-Oct-2021

22:48

System.ServiceModel.dll

4.8.4261.0

6,383,896

05-Oct-2021

22:48

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

05-Oct-2021

22:48

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

05-Oct-2021

22:48

System.ServiceModel.Web.dll

4.8.4261.0

321,792

05-Oct-2021

22:48

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

05-Oct-2021

22:48

System.Web.Extensions.dll

4.8.4331.0

1,842,448

05-Oct-2021

22:48

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

05-Oct-2021

22:48

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

05-Oct-2021

22:48

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

05-Oct-2021

22:48

System.Workflow.Runtime.dll

4.8.4110.0

503,064

05-Oct-2021

22:48

System.configuration.dll

4.8.4190.0

421,536

05-Oct-2021

22:48

System.Data.dll

4.8.4290.0

3,543,432

05-Oct-2021

22:48

System.Data.dll

4.8.4290.0

3,476,360

05-Oct-2021

22:48

System.Deployment.dll

4.8.4290.0

1,593,624

05-Oct-2021

22:48

System.dll

4.8.4380.0

3,554,584

05-Oct-2021

22:48

System.Drawing.Design.dll

4.8.4210.0

125,192

05-Oct-2021

22:48

System.Drawing.dll

4.8.4395.0

595,728

05-Oct-2021

22:48

System.Management.dll

4.8.4450.0

408,856

05-Oct-2021

22:48

System.Security.dll

4.8.4261.0

320,280

05-Oct-2021

22:48

System.Web.dll

4.8.4331.0

5,397,904

05-Oct-2021

22:48

System.Web.dll

4.8.4331.0

5,410,192

05-Oct-2021

22:48

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

05-Oct-2021

22:48

System.Windows.Forms.dll

4.8.4410.0

5,918,488

05-Oct-2021

22:48

System.Xaml.dll

4.8.4395.0

632,104

05-Oct-2021

22:48

UIAutomationClient.dll

4.8.4395.0

170,872

05-Oct-2021

22:48

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

05-Oct-2021

22:48

UIAutomationProvider.dll

4.8.4395.0

41,848

05-Oct-2021

22:48

UIAutomationTypes.dll

4.8.4395.0

215,928

05-Oct-2021

22:48

webengine.dll

4.8.4331.0

21,368

05-Oct-2021

22:48

webengine.dll

4.8.4331.0

19,344

05-Oct-2021

22:48

webengine4.dll

4.8.4331.0

675,192

05-Oct-2021

22:48

webengine4.dll

4.8.4331.0

564,624

05-Oct-2021

22:48

WindowsBase.dll

4.8.4395.0

1,298,808

05-Oct-2021

22:48

WindowsFormsIntegration.dll

4.8.4180.0

105,248

05-Oct-2021

22:48

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

05-Oct-2021

22:48

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

05-Oct-2021

22:48

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,168

05-Oct-2021

22:48

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

05-Oct-2021

22:48

WPFFontCache_v0400.exe

4.8.4395.0

21,920

05-Oct-2021

22:48

WPFFontCache_v0400.exe

4.8.4395.0

19,880

05-Oct-2021

22:48

wpfgfx_v0400.dll

4.8.4395.0

2,050,448

05-Oct-2021

22:48

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

05-Oct-2021

22:48

Information about protection and security

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