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

Quality and reliability improvements

WPF1

- Addresses an issue affecting a DataGrid contained in an outer ScrollViewer.

- Addresses a crash due to ElementNotAvailableException in a ListView with custom data-item automation peers.

CLR2

- When the process is not under high memory pressure it tends to favor doing BGCs over doing full compacting GCs. This is usually desirable but if the app behavior changes dramatically, it could cause much of the fragmentation in older generations (ie, gen2 and LOH) to be unused. You can collect GC ETW events which tell you how much fragmentation there is in gen2 and LOH and verify if you are in this situation.

This version introduces a new GC config GCConserveMemory to detect this situation and be conservative about memory usage and not leave so much fragmentation unused.

You can specify it in the app.config file

<configuration>
  <runtime>
    <GCConserveMemory enabled="N"/>
  </runtime>
</configuration>

where N is an integer value between 0 and 9 (inclusive). 0 is the default. Not specifying this config or specifying it as 0 does not change GC tuning. Specifying a non zero value indicates to the GC how conservative you want GC to be about memory usage – the higher the value is, the more conservative GC will be, ie, the smaller the heap is. We suggest you to experiment with different numbers to see which value works best for you – usually we start with a value between 5 and 7. Note that if we detect LOH has too much fragmentation it will be compacted automatically.

Winforms

- Addresses an issue in Property Grid control to prevent incorrect data read in some scenarios in 64 bit processes.

- Addresses an issue where System.Drawing double frees allocated memory when failing to get printer settings.

ClickOnce

- Addresses a regression introduced in previous updates. We now honor WinTrust policy setting "Ignore timestamp revocation checks" setting when validating timestamps in ClickOnce manifests.

1 Windows Presentation Foundation (WPF)
2 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.

  • 5004229 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 (KB5004229)

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 5003779.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

36,216

26-May-2021

06:50

aspnet_wp.exe

4.8.4331.0

39,808

26-May-2021

06:50

clr.dll

4.8.4395.0

8,039,824

26-May-2021

07:00

clrjit.dll

4.8.4395.0

554,896

26-May-2021

07:00

dfdll.dll

4.8.4290.0

178,040

26-May-2021

06:50

mscordacwks.dll

4.8.4395.0

1,307,528

26-May-2021

07:00

mscordbi.dll

4.8.4395.0

1,188,744

26-May-2021

07:00

mscoreei.dll

4.8.4180.0

581,920

26-May-2021

06:50

mscorlib.dll

4.8.4395.0

5,670,792

26-May-2021

07:00

mscorsvc.dll

4.8.4331.0

454,032

26-May-2021

06:50

mscorsvw.exe

4.8.4331.0

125,880

26-May-2021

06:50

ngen.exe

4.8.4331.0

144,360

26-May-2021

06:50

Placeholder.dll

4.8.4395.0

18,296

26-May-2021

07:00

VsVersion.dll

14.8.4395.0

11,656

26-May-2021

07:00

PenIMC2_v0400.dll

4.8.4395.0

99,704

26-May-2021

07:00

peverify.dll

4.8.4395.0

182,664

26-May-2021

07:00

PresentationCore.dll

4.8.4395.0

3,674,496

26-May-2021

07:00

PresentationFramework.dll

4.8.4395.0

6,283,640

26-May-2021

06:50

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

26-May-2021

06:50

PresentationHost_v0400.dll

4.8.4395.0

233,848

26-May-2021

07:00

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

26-May-2021

07:00

PresentationNative_v0400.dll

4.8.4395.0

923,000

26-May-2021

07:00

ReachFramework.dll

4.8.4110.0

677,656

26-May-2021

06:50

ServiceMonikerSupport.dll

4.8.4261.0

24,456

26-May-2021

06:50

SMDiagnostics.dll

4.8.4261.0

66,328

26-May-2021

06:50

SOS.dll

4.8.4395.0

767,360

26-May-2021

07:00

System.Speech.dll

4.8.4210.0

676,736

26-May-2021

06:50

System.Activities.dll

4.8.4261.0

1,526,528

26-May-2021

06:50

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

26-May-2021

06:50

System.Core.dll

4.8.4395.0

1,549,080

26-May-2021

06:50

System.IdentityModel.dll

4.8.4261.0

1,086,744

26-May-2021

06:50

System.IdentityModel.Services.dll

4.8.4261.0

191,352

26-May-2021

06:50

System.Printing.dll

4.8.4110.0

399,640

26-May-2021

06:50

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

26-May-2021

06:50

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

26-May-2021

06:50

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

26-May-2021

06:50

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

26-May-2021

06:50

System.ServiceModel.dll

4.8.4261.0

6,383,896

26-May-2021

06:50

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

26-May-2021

06:50

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

26-May-2021

06:50

System.ServiceModel.Web.dll

4.8.4261.0

321,792

26-May-2021

06:50

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

26-May-2021

06:50

System.Web.Extensions.dll

4.8.4331.0

1,842,448

26-May-2021

06:50

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

26-May-2021

06:50

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

26-May-2021

06:50

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

26-May-2021

06:50

System.Workflow.Runtime.dll

4.8.4110.0

503,064

26-May-2021

06:50

System.Configuration.dll

4.8.4190.0

421,536

26-May-2021

06:50

System.Data.dll

4.8.4290.0

3,476,360

26-May-2021

06:50

System.Deployment.dll

4.8.4290.0

1,593,624

26-May-2021

06:50

System.dll

4.8.4380.0

3,554,584

26-May-2021

06:50

System.Drawing.Design.dll

4.8.4210.0

125,192

26-May-2021

06:50

System.Drawing.dll

4.8.4395.0

595,728

26-May-2021

06:50

System.Security.dll

4.8.4261.0

320,280

26-May-2021

06:50

System.Web.dll

4.8.4331.0

5,410,192

26-May-2021

06:50

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

26-May-2021

06:50

System.Windows.Forms.dll

4.8.4395.0

5,915,952

26-May-2021

06:50

System.Xaml.dll

4.8.4395.0

632,104

26-May-2021

06:50

UIAutomationClient.dll

4.8.4395.0

170,872

26-May-2021

06:50

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

26-May-2021

06:50

UIAutomationProvider.dll

4.8.4395.0

41,848

26-May-2021

06:50

UIAutomationTypes.dll

4.8.4395.0

215,928

26-May-2021

06:50

webengine.dll

4.8.4331.0

19,344

26-May-2021

06:50

webengine4.dll

4.8.4331.0

564,624

26-May-2021

06:50

WindowsBase.dll

4.8.4395.0

1,298,808

26-May-2021

06:50

WindowsFormsIntegration.dll

4.8.4180.0

105,248

26-May-2021

06:50

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

26-May-2021

06:50

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

26-May-2021

07:00

WPFFontCache_v0400.exe

4.8.4395.0

19,880

26-May-2021

07:00

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

26-May-2021

07:00

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4331.0

41,872

26-May-2021

06:50

Aspnet_perf.dll

4.8.4331.0

36,216

26-May-2021

06:50

aspnet_wp.exe

4.8.4331.0

45,440

26-May-2021

06:50

aspnet_wp.exe

4.8.4331.0

39,808

26-May-2021

06:50

clr.dll

4.8.4395.0

11,242,888

26-May-2021

06:50

clr.dll

4.8.4395.0

8,039,824

26-May-2021

07:00

clrjit.dll

4.8.4395.0

1,358,216

26-May-2021

06:50

clrjit.dll

4.8.4395.0

554,896

26-May-2021

07:00

compatjit.dll

4.8.4395.0

1,273,216

26-May-2021

06:50

dfdll.dll

4.8.4290.0

214,920

26-May-2021

06:50

dfdll.dll

4.8.4290.0

178,040

26-May-2021

06:50

mscordacwks.dll

4.8.4395.0

1,801,088

26-May-2021

06:50

mscordacwks.dll

4.8.4395.0

1,307,528

26-May-2021

07:00

mscordbi.dll

4.8.4395.0

1,655,184

26-May-2021

06:50

mscordbi.dll

4.8.4395.0

1,188,744

26-May-2021

07:00

mscoreei.dll

4.8.4180.0

689,952

26-May-2021

06:50

mscoreei.dll

4.8.4180.0

581,920

26-May-2021

06:50

mscorlib.dll

4.8.4395.0

5,431,688

26-May-2021

06:50

mscorlib.dll

4.8.4395.0

5,670,792

26-May-2021

07:00

mscorsvc.dll

4.8.4331.0

557,944

26-May-2021

06:50

mscorsvc.dll

4.8.4331.0

454,032

26-May-2021

06:50

mscorsvw.exe

4.8.4331.0

152,000

26-May-2021

06:50

mscorsvw.exe

4.8.4331.0

125,880

26-May-2021

06:50

ngen.exe

4.8.4331.0

174,568

26-May-2021

06:50

ngen.exe

4.8.4331.0

144,360

26-May-2021

06:50

VsVersion.dll

14.8.4395.0

11,648

26-May-2021

06:50

Placeholder.dll

4.8.4395.0

20,360

26-May-2021

06:50

Placeholder.dll

4.8.4395.0

18,296

26-May-2021

07:00

VsVersion.dll

14.8.4395.0

11,656

26-May-2021

07:00

PenIMC2_v0400.dll

4.8.4395.0

120,712

26-May-2021

06:50

PenIMC2_v0400.dll

4.8.4395.0

99,704

26-May-2021

07:00

peverify.dll

4.8.4395.0

265,608

26-May-2021

06:50

peverify.dll

4.8.4395.0

182,664

26-May-2021

07:00

PresentationCore.dll

4.8.4395.0

3,650,952

26-May-2021

06:50

PresentationCore.dll

4.8.4395.0

3,674,496

26-May-2021

07:00

PresentationFramework.dll

4.8.4395.0

6,283,640

26-May-2021

06:50

PresentationFramework-SystemData.dll

4.8.4395.0

17,800

26-May-2021

06:50

PresentationHost_v0400.dll

4.8.4395.0

302,472

26-May-2021

06:50

PresentationHost_v0400.dll.mui

4.8.4395.0

77,712

26-May-2021

06:50

PresentationHost_v0400.dll

4.8.4395.0

233,848

26-May-2021

07:00

PresentationHost_v0400.dll.mui

4.8.4395.0

77,704

26-May-2021

07:00

PresentationNative_v0400.dll

4.8.4395.0

1,164,176

26-May-2021

06:50

PresentationNative_v0400.dll

4.8.4395.0

923,000

26-May-2021

07:00

ReachFramework.dll

4.8.4110.0

677,656

26-May-2021

06:50

ServiceMonikerSupport.dll

4.8.4261.0

27,512

26-May-2021

06:50

ServiceMonikerSupport.dll

4.8.4261.0

24,456

26-May-2021

06:50

SMDiagnostics.dll

4.8.4261.0

66,328

26-May-2021

06:50

SOS.dll

4.8.4395.0

921,480

26-May-2021

06:50

SOS.dll

4.8.4395.0

767,360

26-May-2021

07:00

System.Speech.dll

4.8.4210.0

676,736

26-May-2021

06:50

System.Activities.dll

4.8.4261.0

1,526,528

26-May-2021

06:50

System.Activities.Presentation.dll

4.8.4180.0

2,127,136

26-May-2021

06:50

System.Core.dll

4.8.4395.0

1,549,080

26-May-2021

06:50

System.IdentityModel.dll

4.8.4261.0

1,086,744

26-May-2021

06:50

System.IdentityModel.Services.dll

4.8.4261.0

191,352

26-May-2021

06:50

System.Printing.dll

4.8.4110.0

400,152

26-May-2021

06:50

System.Printing.dll

4.8.4110.0

399,640

26-May-2021

06:50

System.Runtime.Serialization.dll

4.8.4261.0

1,047,312

26-May-2021

06:50

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

26-May-2021

06:50

System.ServiceModel.Channels.dll

4.8.4261.0

150,904

26-May-2021

06:50

System.ServiceModel.Discovery.dll

4.8.4261.0

301,432

26-May-2021

06:50

System.ServiceModel.dll

4.8.4261.0

6,383,896

26-May-2021

06:50

System.ServiceModel.Internals.dll

4.8.4261.0

246,528

26-May-2021

06:50

System.ServiceModel.WasHosting.dll

4.8.4261.0

33,144

26-May-2021

06:50

System.ServiceModel.Web.dll

4.8.4261.0

321,792

26-May-2021

06:50

System.Web.ApplicationServices.dll

4.8.4331.0

63,784

26-May-2021

06:50

System.Web.Extensions.dll

4.8.4331.0

1,842,448

26-May-2021

06:50

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

26-May-2021

06:50

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

26-May-2021

06:50

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

26-May-2021

06:50

System.Workflow.Runtime.dll

4.8.4110.0

503,064

26-May-2021

06:50

System.configuration.dll

4.8.4190.0

421,536

26-May-2021

06:50

System.Data.dll

4.8.4290.0

3,543,432

26-May-2021

06:50

System.Data.dll

4.8.4290.0

3,476,360

26-May-2021

06:50

System.Deployment.dll

4.8.4290.0

1,593,624

26-May-2021

06:50

System.dll

4.8.4380.0

3,554,584

26-May-2021

06:50

System.Drawing.Design.dll

4.8.4210.0

125,192

26-May-2021

06:50

System.Drawing.dll

4.8.4395.0

595,728

26-May-2021

06:50

System.Security.dll

4.8.4261.0

320,280

26-May-2021

06:50

System.Web.dll

4.8.4331.0

5,397,904

26-May-2021

06:50

System.Web.dll

4.8.4331.0

5,410,192

26-May-2021

06:50

System.Windows.Controls.Ribbon.dll

4.8.4395.0

743,824

26-May-2021

06:50

System.Windows.Forms.dll

4.8.4395.0

5,915,952

26-May-2021

06:50

System.Xaml.dll

4.8.4395.0

632,104

26-May-2021

06:50

UIAutomationClient.dll

4.8.4395.0

170,872

26-May-2021

06:50

UIAutomationClientsideProviders.dll

4.8.4395.0

354,176

26-May-2021

06:50

UIAutomationProvider.dll

4.8.4395.0

41,848

26-May-2021

06:50

UIAutomationTypes.dll

4.8.4395.0

215,928

26-May-2021

06:50

webengine.dll

4.8.4331.0

21,368

26-May-2021

06:50

webengine.dll

4.8.4331.0

19,344

26-May-2021

06:50

webengine4.dll

4.8.4331.0

675,192

26-May-2021

06:50

webengine4.dll

4.8.4331.0

564,624

26-May-2021

06:50

WindowsBase.dll

4.8.4395.0

1,298,808

26-May-2021

06:50

WindowsFormsIntegration.dll

4.8.4180.0

105,248

26-May-2021

06:50

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

26-May-2021

06:50

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

26-May-2021

06:50

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,168

26-May-2021

07:28

WPFFontCache_v0400.exe.mui

4.8.4395.0

12,152

26-May-2021

07:00

WPFFontCache_v0400.exe

4.8.4395.0

21,920

26-May-2021

07:28

WPFFontCache_v0400.exe

4.8.4395.0

19,880

26-May-2021

07:00

wpfgfx_v0400.dll

4.8.4395.0

2,050,448

26-May-2021

06:50

wpfgfx_v0400.dll

4.8.4395.0

1,618,816

26-May-2021

07:00

Information about protection and security

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