Applies to:

Microsoft .NET Framework 4.8

The September 24, 2019, update for Windows 7 Service Pack 1 (SP1) and Windows Server 2008 R2 SP1 includes cumulative reliability improvements in Microsoft .NET Framework 4.8. We recommend that you apply this update as part of your regular maintenance routines. Before you install this update, see the Prerequisites and Restart requirement sections.

Important

  • Starting in August 2019, updates to .NET Framework 4.6 and later for Windows Server 2008 SP2, Windows Server 2008 R2 SP1, and Windows 7 SP1 require SHA-2 code signing support. To avoid installation issues, make sure that you have all the latest Windows updates installed before you apply this update. For more information about SHA-2 code signing support updates, see KB 4474419.

Quality and reliability improvements

BCL1

  • Addresses an issue that affects thread contention that occurs in BinaryFormatter.GetTypeInformation by using ConcurrentDictionary to handle multi-thread access.

WPF2

  • Addresses an issue that affects a WPF ComboBox (or any Selector) within a DataGrid cell that can try to change its selection properties (SelectedIndex, SelectedItem, SelectedValue) when the cell's data item is revirtualized or removed from the underlying collection. This can occur if the Selector's ItemSource property is data bound through the cell's DataContext setting. Depending on the virtualization mode and the bindings that are declared for the selection properties, the symptoms can include unexpected changes (to null) of the data item's properties, and unexpected displays (as null) of other data items that re-use the UI that was previously attached to the revirtualized item.

  • Addresses an issue in which a WPF TextBox or RichTextBox element that has spell checking enabled crashes and returns an "ExecutionEngineException" error in some situations, including inserting text near a hyperlink.

  • Addresses an issue that affects Per-Monitor Aware WPF applications that host System-Aware or Unaware child windows and that run on .NET Framework 4.8. This .NET version occasionally crashes and returns a "System.Collections.Generic.KeyNotFoundException" exception.

CLR3

  • Addresses an issue that might cause handle leaks to occur in scenarios that repeatedly load and unload Mscoree.dll.

  • Addresses rare cases that incorrectly cause process termination instead of delivering the expected NullReferenceException result.


1 Base Class Library (BCL)
2 Windows Presentation Foundation (WPF)
3 Common Language Runtime (CLR)

Additional information about this update

The following article contains additional information about this update as it relates to individual product versions.

  • 4516551 Description of the Preview of 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 and Windows Server 2008 (KB4516551)

How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

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

Method 3: Windows Software Update Services (WSUS)

On your WSUS server, follow these steps:

  1. Select Start, select Administrative Tools, and then select Microsoft Windows Server Update Services 3.0.

  2. Expand ComputerName, and then select Action.

  3. Select Import Updates.

  4. WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.

  5. After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Enter 4516551 into the Search box, and then select Search.

  6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

  7. After you select all the packages that you require, select View Basket.

  8. To import the packages to your WSUS server, select Import.

  9. After the packages are imported, select Close to return to WSUS.

The updates are now available for installation through WSUS.

Prerequisites

To apply this update, you must have .NET Framework 4.8 installed.

Restart requirement

You must restart the computer after you apply this update if any affected files are being used. We recommend that you exit all .NET Framework-based applications before you apply this update.

Update replacement information

This update replaces previously released updates 4512193.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables.

 

 

 

x86 NDP48

File name

File version

File size

Date

Time

Platform

Dhtmlheader.html

Not applicable

16,118

24-Jul-2019

00:50

Not applicable

Header.bmp

Not applicable

7,306

25-Jun-2019

23:09

Not applicable

Ndp48-kb4515847.msp

Not applicable

20,303,872

08-Aug-2019

03:55

Not applicable

Parameterinfo.xml

Not applicable

60,676

08-Aug-2019

05:22

Not applicable

Setup.exe

14.8.4018.0

129,328

07-Aug-2019

08:03

x86

Setupengine.dll

14.8.4018.0

923,928

07-Aug-2019

08:03

x86

Setupui.dll

14.8.4018.0

351,000

07-Aug-2019

08:03

x86

Setupui.xsd

Not applicable

32,572

26-Jun-2019

22:23

Not applicable

Setuputility.exe

14.8.4018.0

311,368

07-Aug-2019

08:03

x86

Splashscreen.bmp

Not applicable

196,662

25-Jun-2019

23:24

Not applicable

Sqmapi.dll

6.2.9200.16384

226,456

24-Jul-2019

00:49

x86

Strings.xml

Not applicable

14,092

25-Jun-2019

23:24

Not applicable

Uiinfo.xml

Not applicable

36,428

25-Jun-2019

23:24

Not applicable

Watermark.bmp

Not applicable

110,348

25-Jun-2019

23:09

Not applicable

Eula.rtf

Not applicable

124,495

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

79,996

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

30,992

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

160,295

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

68,564

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

27,928

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

132,348

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

85,628

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

131,637

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

83,202

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

111,186

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

87,944

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,040

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

142,041

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

90,134

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,552

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

128,314

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

82,766

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

31,000

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,247

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

83,690

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

156,440

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

87,542

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,040

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

146,392

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

78,194

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

30,480

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

158,420

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

86,630

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,048

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

147,275

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

85,478

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

155,616

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

74,568

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

28,944

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

259,432

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

72,820

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

28,432

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,812

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

85,028

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,048

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

148,376

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

84,512

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

31,504

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

151,635

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

87,426

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,226

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

84,286

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

188,741

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

86,088

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,536

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

149,236

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

83,212

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

140,171

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

83,166

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

146,273

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

68,502

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

27,416

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

147,662

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

85,990

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

129,883

24-Jul-2019

00:45

Not applicable

Localizeddata.xml

Not applicable

85,264

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,536

07-Aug-2019

08:09

x86

Print.ico

Not applicable

126,132

24-Jul-2019

00:50

Not applicable

Rotate1.ico

Not applicable

143,901

24-Jul-2019

00:50

Not applicable

Rotate10.ico

Not applicable

143,932

24-Jul-2019

00:50

Not applicable

Rotate2.ico

Not applicable

144,110

24-Jul-2019

00:50

Not applicable

Rotate3.ico

Not applicable

144,151

24-Jul-2019

00:50

Not applicable

Rotate4.ico

Not applicable

144,033

24-Jul-2019

00:50

Not applicable

Rotate5.ico

Not applicable

143,871

24-Jul-2019

00:50

Not applicable

Rotate6.ico

Not applicable

143,881

24-Jul-2019

00:50

Not applicable

Rotate7.ico

Not applicable

144,084

24-Jul-2019

00:50

Not applicable

Rotate8.ico

Not applicable

143,835

24-Jul-2019

00:50

Not applicable

Rotate9.ico

Not applicable

144,064

24-Jul-2019

00:50

Not applicable

Save.ico

Not applicable

126,548

24-Jul-2019

00:50

Not applicable

Setup.ico

Not applicable

126,246

24-Jul-2019

00:50

Not applicable

Stop.ico

Not applicable

190,199

24-Jul-2019

00:50

Not applicable

Sysreqmet.ico

Not applicable

136,313

24-Jul-2019

00:50

Not applicable

Sysreqnotmet.ico

Not applicable

143,990

24-Jul-2019

00:50

Not applicable

Warn.ico

Not applicable

199,341

24-Jul-2019

00:50

Not applicable

x64 NDP48

File name

File version

File size

Date

Time

Platform

Dhtmlheader.html

Not applicable

16,118

15-Jul-2019

02:09

Not applicable

Header.bmp

Not applicable

7,306

19-Apr-2018

17:11

Not applicable

Ndp48-kb4515847.msp

Not applicable

33,751,040

08-Aug-2019

04:10

Not applicable

Parameterinfo.xml

Not applicable

60,676

08-Aug-2019

05:21

Not applicable

Setup.exe

14.8.4018.0

129,328

07-Aug-2019

08:03

x86

Setupengine.dll

14.8.4018.0

923,928

07-Aug-2019

08:03

x86

Setupui.dll

14.8.4018.0

351,000

07-Aug-2019

08:03

x86

Setupui.xsd

Not applicable

32,572

26-Jun-2019

22:23

Not applicable

Setuputility.exe

14.8.4018.0

311,368

07-Aug-2019

08:03

x86

Splashscreen.bmp

Not applicable

196,662

19-Apr-2018

17:17

Not applicable

Sqmapi.dll

6.2.9200.16384

226,456

15-Jul-2019

02:08

x86

Strings.xml

Not applicable

14,092

19-Apr-2018

17:17

Not applicable

Uiinfo.xml

Not applicable

36,428

19-Apr-2018

17:17

Not applicable

Watermark.bmp

Not applicable

110,348

19-Apr-2018

17:11

Not applicable

Eula.rtf

Not applicable

124,495

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

79,996

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

30,992

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

160,295

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

68,564

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

27,928

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

132,348

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

85,628

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

131,637

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

83,202

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

111,186

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

87,944

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,040

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

142,041

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

90,134

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,552

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

128,314

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

82,766

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

31,000

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,247

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

83,690

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

156,440

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

87,542

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,040

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

146,392

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

78,194

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

30,480

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

158,420

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

86,630

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,048

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

147,275

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

85,478

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

155,616

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

74,568

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

28,944

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

259,432

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

72,820

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

28,432

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,812

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

85,028

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

33,048

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

148,376

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

84,512

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

31,504

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

151,635

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

87,426

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

137,226

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

84,286

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,024

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

188,741

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

86,088

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,536

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

149,236

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

83,212

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

140,171

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

83,166

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,016

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

146,273

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

68,502

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

27,416

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

147,662

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

85,990

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,528

07-Aug-2019

08:09

x86

Eula.rtf

Not applicable

129,883

15-Jul-2019

02:04

Not applicable

Localizeddata.xml

Not applicable

85,264

08-Aug-2019

03:42

Not applicable

Setupresources.dll

14.8.4018.0

32,536

07-Aug-2019

08:09

x86

Print.ico

Not applicable

126,132

15-Jul-2019

02:09

Not applicable

Rotate1.ico

Not applicable

143,901

15-Jul-2019

02:09

Not applicable

Rotate10.ico

Not applicable

143,932

15-Jul-2019

02:09

Not applicable

Rotate2.ico

Not applicable

144,110

15-Jul-2019

02:09

Not applicable

Rotate3.ico

Not applicable

144,151

15-Jul-2019

02:09

Not applicable

Rotate4.ico

Not applicable

144,033

15-Jul-2019

02:09

Not applicable

Rotate5.ico

Not applicable

143,871

15-Jul-2019

02:09

Not applicable

Rotate6.ico

Not applicable

143,881

15-Jul-2019

02:09

Not applicable

Rotate7.ico

Not applicable

144,084

15-Jul-2019

02:09

Not applicable

Rotate8.ico

Not applicable

143,835

15-Jul-2019

02:09

Not applicable

Rotate9.ico

Not applicable

144,064

15-Jul-2019

02:09

Not applicable

Save.ico

Not applicable

126,548

15-Jul-2019

02:09

Not applicable

Setup.ico

Not applicable

126,246

15-Jul-2019

02:09

Not applicable

Stop.ico

Not applicable

190,199

15-Jul-2019

02:09

Not applicable

Sysreqmet.ico

Not applicable

136,313

15-Jul-2019

02:09

Not applicable

Sysreqnotmet.ico

Not applicable

143,990

15-Jul-2019

02:09

Not applicable

Warn.ico

Not applicable

199,341

15-Jul-2019

02:09

Not applicable

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