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

WPF1

- Addresses an issue where DWM failures can cause WPF's render thread to fail. An app can opt-in to the behavior of ignoring all DwmFlush errors by setting a regkey in HKCU\Software\Microsoft\Avalon.Graphics\IgnoreDwmFlushErrors or HKLM\Software\Microsoft\Avalon.Graphics\IgnoreDwmFlushErrors whose name is the full path to the .exe that wants to opt-in, and whose DWORD value is 1.

- Addresses an issue of WPF apps not working with "Text Cursor Indicator" enabled when using RichTextBox.

Winforms

- Improved the hardened rendering of ComboBox controls on 64 bit architectures.

- Improved the reliability of data-bound ComboBox controls under assistive technology.

.NET Runtime

- Addresses several issues that would cause too many garbage collections under high memory load. The part of the change that reduces the number of blocking generation 2 collections under high memory load is considered a tuning change and is only active if the GCConserveMemory setting is set to a non-zero value. The part of the change that reduces needless generation 0 collections is considered an improvement and is always active.

- Adjusted GC Heap Hard Limit configuration, as well as processor interpretation for .NET Framework container scenarios.

Workflow

- Addresses an issue when users interact with the Workflow Designer they might encounter incorrectly disabled context menu items when right clicking on a variable in the component variables list..

1Windows Presentation Foundation (WPF)

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.

  • 5014806 Description of the Security and Quality Rollup for .NET Framework 3.5.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 SP1 and Windows Server 2008 R2 SP1 (KB5014806)

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 KB5010581.

File Information

x86

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4494.0

36,232

06-May-2022

21:05

aspnet_wp.exe

4.8.4494.0

40,880

06-May-2022

21:05

clr.dll

4.8.4526.0

8,658,320

06-May-2022

21:28

clrjit.dll

4.8.4526.0

555,920

06-May-2022

21:28

dfdll.dll

4.8.4290.0

178,040

06-May-2022

21:05

mscordacwks.dll

4.8.4526.0

1,309,096

06-May-2022

21:28

mscordbi.dll

4.8.4526.0

1,189,800

06-May-2022

21:28

mscoreei.dll

4.8.4180.0

581,920

06-May-2022

21:05

mscorlib.dll

4.8.4526.0

5,671,856

06-May-2022

21:28

mscorsvc.dll

4.8.4331.0

454,032

06-May-2022

21:05

mscorsvw.exe

4.8.4331.0

125,880

06-May-2022

21:05

ngen.exe

4.8.4331.0

144,360

06-May-2022

21:05

Placeholder.dll

4.8.4526.0

19,368

06-May-2022

21:28

VsVersion.dll

14.8.4526.0

12,688

06-May-2022

21:28

PenIMC2_v0400.dll

4.8.4526.0

100,776

06-May-2022

21:28

peverify.dll

4.8.4526.0

183,720

06-May-2022

21:28

PresentationCore.dll

4.8.4526.0

3,677,608

06-May-2022

21:28

PresentationFramework.dll

4.8.4526.0

6,286,248

06-May-2022

21:05

PresentationFramework-SystemData.dll

4.8.4526.0

18,848

06-May-2022

21:05

PresentationHost_v0400.dll

4.8.4526.0

234,928

06-May-2022

21:28

PresentationHost_v0400.dll.mui

4.8.4526.0

78,736

06-May-2022

21:28

PresentationNative_v0400.dll

4.8.4526.0

924,072

06-May-2022

21:28

ReachFramework.dll

4.8.4110.0

677,656

06-May-2022

21:05

ServiceMonikerSupport.dll

4.8.4465.0

24,464

06-May-2022

21:05

SMDiagnostics.dll

4.8.4465.0

66,328

06-May-2022

21:05

SOS.dll

4.8.4526.0

769,448

06-May-2022

21:28

System.Speech.dll

4.8.4210.0

676,736

06-May-2022

21:05

System.Activities.dll

4.8.4465.0

1,526,576

06-May-2022

21:05

System.Activities.Presentation.dll

4.8.4526.0

2,121,104

06-May-2022

21:05

System.Core.dll

4.8.4526.0

1,551,168

06-May-2022

21:05

System.IdentityModel.dll

4.8.4465.0

1,086,752

06-May-2022

21:05

System.IdentityModel.Services.dll

4.8.4465.0

191,376

06-May-2022

21:05

System.Printing.dll

4.8.4110.0

399,640

06-May-2022

21:05

System.Runtime.Serialization.dll

4.8.4465.0

1,047,320

06-May-2022

21:05

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

06-May-2022

21:05

System.ServiceModel.Channels.dll

4.8.4465.0

150,920

06-May-2022

21:05

System.ServiceModel.Discovery.dll

4.8.4465.0

301,432

06-May-2022

21:05

System.ServiceModel.dll

4.8.4465.0

6,384,888

06-May-2022

21:05

System.ServiceModel.Internals.dll

4.8.4465.0

246,552

06-May-2022

21:05

System.ServiceModel.WasHosting.dll

4.8.4465.0

33,160

06-May-2022

21:05

System.ServiceModel.Web.dll

4.8.4261.0

321,792

06-May-2022

21:05

System.Web.ApplicationServices.dll

4.8.4494.0

65,896

06-May-2022

21:05

System.Web.Extensions.dll

4.8.4494.0

1,844,576

06-May-2022

21:05

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

06-May-2022

21:05

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

06-May-2022

21:05

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

06-May-2022

21:05

System.Workflow.Runtime.dll

4.8.4110.0

503,064

06-May-2022

21:05

System.Configuration.dll

4.8.4190.0

421,536

06-May-2022

21:05

System.Data.dll

4.8.4465.0

3,476,880

06-May-2022

21:05

System.Deployment.dll

4.8.4290.0

1,593,624

06-May-2022

21:05

System.DirectoryServices.dll

4.8.4510.0

418,112

06-May-2022

21:05

System.dll

4.8.4494.0

3,556,712

06-May-2022

21:05

System.Drawing.Design.dll

4.8.4210.0

125,192

06-May-2022

21:05

System.Drawing.dll

4.8.4395.0

595,728

06-May-2022

21:05

System.Management.dll

4.8.4450.0

408,856

06-May-2022

21:05

System.Security.dll

4.8.4261.0

320,280

06-May-2022

21:05

System.Web.dll

4.8.4494.0

5,410,184

06-May-2022

21:05

System.Windows.Controls.Ribbon.dll

4.8.4526.0

744,880

06-May-2022

21:05

System.Windows.Forms.dll

4.8.4526.0

5,922,120

06-May-2022

21:05

System.Xaml.dll

4.8.4526.0

634,184

06-May-2022

21:05

UIAutomationClient.dll

4.8.4526.0

172,456

06-May-2022

21:05

UIAutomationClientsideProviders.dll

4.8.4526.0

355,240

06-May-2022

21:05

UIAutomationProvider.dll

4.8.4526.0

42,920

06-May-2022

21:05

UIAutomationTypes.dll

4.8.4526.0

216,976

06-May-2022

21:05

webengine.dll

4.8.4494.0

20,400

06-May-2022

21:05

webengine4.dll

4.8.4494.0

565,680

06-May-2022

21:05

WindowsBase.dll

4.8.4526.0

1,300,384

06-May-2022

21:05

WindowsFormsIntegration.dll

4.8.4180.0

105,248

06-May-2022

21:05

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

06-May-2022

21:05

WPFFontCache_v0400.exe.mui

4.8.4526.0

13,224

06-May-2022

21:48

WPFFontCache_v0400.exe

4.8.4526.0

20,912

06-May-2022

21:48

wpfgfx_v0400.dll

4.8.4526.0

1,620,400

06-May-2022

21:28

x64

File name

File version

File size

Date

Time

Aspnet_perf.dll

4.8.4494.0

41,864

06-May-2022

21:05

Aspnet_perf.dll

4.8.4494.0

36,232

06-May-2022

21:05

aspnet_wp.exe

4.8.4494.0

45,448

06-May-2022

21:05

aspnet_wp.exe

4.8.4494.0

40,880

06-May-2022

21:05

clr.dll

4.8.4526.0

11,711,400

06-May-2022

21:05

clr.dll

4.8.4526.0

8,658,320

06-May-2022

21:28

clrjit.dll

4.8.4526.0

1,359,280

06-May-2022

21:05

clrjit.dll

4.8.4526.0

555,920

06-May-2022

21:28

compatjit.dll

4.8.4526.0

1,274,280

06-May-2022

21:05

dfdll.dll

4.8.4290.0

214,920

06-May-2022

21:05

dfdll.dll

4.8.4290.0

178,040

06-May-2022

21:05

mscordacwks.dll

4.8.4526.0

1,804,200

06-May-2022

21:05

mscordacwks.dll

4.8.4526.0

1,309,096

06-May-2022

21:28

mscordbi.dll

4.8.4526.0

1,656,232

06-May-2022

21:05

mscordbi.dll

4.8.4526.0

1,189,800

06-May-2022

21:28

mscoreei.dll

4.8.4180.0

689,952

06-May-2022

21:05

mscoreei.dll

4.8.4180.0

581,920

06-May-2022

21:05

mscorlib.dll

4.8.4526.0

5,432,744

06-May-2022

21:05

mscorlib.dll

4.8.4526.0

5,671,856

06-May-2022

21:28

mscorsvc.dll

4.8.4331.0

557,944

06-May-2022

21:05

mscorsvc.dll

4.8.4331.0

454,032

06-May-2022

21:05

mscorsvw.exe

4.8.4331.0

152,000

06-May-2022

21:05

mscorsvw.exe

4.8.4331.0

125,880

06-May-2022

21:05

ngen.exe

4.8.4331.0

174,568

06-May-2022

21:05

ngen.exe

4.8.4331.0

144,360

06-May-2022

21:05

VsVersion.dll

14.8.4526.0

12,712

06-May-2022

21:05

Placeholder.dll

4.8.4526.0

21,408

06-May-2022

21:05

Placeholder.dll

4.8.4526.0

19,368

06-May-2022

21:28

VsVersion.dll

14.8.4526.0

12,688

06-May-2022

21:28

PenIMC2_v0400.dll

4.8.4526.0

121,760

06-May-2022

21:05

PenIMC2_v0400.dll

4.8.4526.0

100,776

06-May-2022

21:28

peverify.dll

4.8.4526.0

266,656

06-May-2022

21:05

peverify.dll

4.8.4526.0

183,720

06-May-2022

21:28

PresentationCore.dll

4.8.4526.0

3,653,536

06-May-2022

21:05

PresentationCore.dll

4.8.4526.0

3,677,608

06-May-2022

21:28

PresentationFramework.dll

4.8.4526.0

6,286,248

06-May-2022

21:05

PresentationFramework-SystemData.dll

4.8.4526.0

18,848

06-May-2022

21:05

PresentationHost_v0400.dll

4.8.4526.0

303,520

06-May-2022

21:05

PresentationHost_v0400.dll.mui

4.8.4526.0

78,752

06-May-2022

21:05

PresentationHost_v0400.dll

4.8.4526.0

234,928

06-May-2022

21:28

PresentationHost_v0400.dll.mui

4.8.4526.0

78,736

06-May-2022

21:28

PresentationNative_v0400.dll

4.8.4526.0

1,165,216

06-May-2022

21:05

PresentationNative_v0400.dll

4.8.4526.0

924,072

06-May-2022

21:28

ReachFramework.dll

4.8.4110.0

677,656

06-May-2022

21:05

ServiceMonikerSupport.dll

4.8.4465.0

27,528

06-May-2022

21:05

ServiceMonikerSupport.dll

4.8.4465.0

24,464

06-May-2022

21:05

SMDiagnostics.dll

4.8.4465.0

66,328

06-May-2022

21:05

SOS.dll

4.8.4526.0

923,552

06-May-2022

21:05

SOS.dll

4.8.4526.0

769,448

06-May-2022

21:28

System.Speech.dll

4.8.4210.0

676,736

06-May-2022

21:05

System.Activities.dll

4.8.4465.0

1,526,576

06-May-2022

21:05

System.Activities.Presentation.dll

4.8.4526.0

2,121,104

06-May-2022

21:05

System.Core.dll

4.8.4526.0

1,551,168

06-May-2022

21:05

System.IdentityModel.dll

4.8.4465.0

1,086,752

06-May-2022

21:05

System.IdentityModel.Services.dll

4.8.4465.0

191,376

06-May-2022

21:05

System.Printing.dll

4.8.4110.0

400,152

06-May-2022

21:05

System.Printing.dll

4.8.4110.0

399,640

06-May-2022

21:05

System.Runtime.Serialization.dll

4.8.4465.0

1,047,320

06-May-2022

21:05

System.ServiceModel.Activities.dll

4.8.4261.0

555,384

06-May-2022

21:05

System.ServiceModel.Channels.dll

4.8.4465.0

150,920

06-May-2022

21:05

System.ServiceModel.Discovery.dll

4.8.4465.0

301,432

06-May-2022

21:05

System.ServiceModel.dll

4.8.4465.0

6,384,888

06-May-2022

21:05

System.ServiceModel.Internals.dll

4.8.4465.0

246,552

06-May-2022

21:05

System.ServiceModel.WasHosting.dll

4.8.4465.0

33,160

06-May-2022

21:05

System.ServiceModel.Web.dll

4.8.4261.0

321,792

06-May-2022

21:05

System.Web.ApplicationServices.dll

4.8.4494.0

65,896

06-May-2022

21:05

System.Web.Extensions.dll

4.8.4494.0

1,844,576

06-May-2022

21:05

System.Windows.Forms.DataVisualization.dll

4.8.4210.0

1,712,512

06-May-2022

21:05

System.Workflow.Activities.dll

4.8.4110.0

1,051,112

06-May-2022

21:05

System.Workflow.ComponentModel.dll

4.8.4110.0

1,557,272

06-May-2022

21:05

System.Workflow.Runtime.dll

4.8.4110.0

503,064

06-May-2022

21:05

System.configuration.dll

4.8.4190.0

421,536

06-May-2022

21:05

System.Data.dll

4.8.4465.0

3,543,928

06-May-2022

21:05

System.Data.dll

4.8.4465.0

3,476,880

06-May-2022

21:05

System.Deployment.dll

4.8.4290.0

1,593,624

06-May-2022

21:05

System.DirectoryServices.dll

4.8.4510.0

418,112

06-May-2022

21:05

System.dll

4.8.4494.0

3,556,712

06-May-2022

21:05

System.Drawing.Design.dll

4.8.4210.0

125,192

06-May-2022

21:05

System.Drawing.dll

4.8.4395.0

595,728

06-May-2022

21:05

System.Management.dll

4.8.4450.0

408,856

06-May-2022

21:05

System.Security.dll

4.8.4261.0

320,280

06-May-2022

21:05

System.Web.dll

4.8.4494.0

5,398,408

06-May-2022

21:05

System.Web.dll

4.8.4494.0

5,410,184

06-May-2022

21:05

System.Windows.Controls.Ribbon.dll

4.8.4526.0

744,880

06-May-2022

21:05

System.Windows.Forms.dll

4.8.4526.0

5,922,120

06-May-2022

21:05

System.Xaml.dll

4.8.4526.0

634,184

06-May-2022

21:05

UIAutomationClient.dll

4.8.4526.0

172,456

06-May-2022

21:05

UIAutomationClientsideProviders.dll

4.8.4526.0

355,240

06-May-2022

21:05

UIAutomationProvider.dll

4.8.4526.0

42,920

06-May-2022

21:05

UIAutomationTypes.dll

4.8.4526.0

216,976

06-May-2022

21:05

webengine.dll

4.8.4494.0

21,384

06-May-2022

21:05

webengine.dll

4.8.4494.0

20,400

06-May-2022

21:05

webengine4.dll

4.8.4494.0

675,200

06-May-2022

21:05

webengine4.dll

4.8.4494.0

565,680

06-May-2022

21:05

WindowsBase.dll

4.8.4526.0

1,300,384

06-May-2022

21:05

WindowsFormsIntegration.dll

4.8.4180.0

105,248

06-May-2022

21:05

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

102,672

06-May-2022

21:05

WorkflowServiceHostPerformanceCounters.dll

4.8.4110.0

89,368

06-May-2022

21:05

WPFFontCache_v0400.exe.mui

4.8.4526.0

13,216

06-May-2022

21:48

WPFFontCache_v0400.exe.mui

4.8.4526.0

13,224

06-May-2022

21:48

WPFFontCache_v0400.exe

4.8.4526.0

22,968

06-May-2022

21:48

WPFFontCache_v0400.exe

4.8.4526.0

20,912

06-May-2022

21:48

wpfgfx_v0400.dll

4.8.4526.0

2,052,000

06-May-2022

21:05

wpfgfx_v0400.dll

4.8.4526.0

1,620,400

06-May-2022

21:28

Information about protection and security

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×