This May 2018 Update for Windows 7 SP1 and Windows Server 2008 R2 SP1 includes cumulative reliability improvements in .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1. Additionally, this May 2018 Update for Windows Server 2008 includes improvements in .NET Framework 4.6. 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.
- All updates for .NET Framework 4.6, 4.6.1, 4.6.2, and 4.7 require the d3dcompiler_47.dll update to be installed. We recommend that you install the included d3dcompiler_47.dll update before you apply this update. For more information about the d3dcompiler_47.dll update, see KB 4019990 for Windows 7 SP1 and Windows Server 2008 R2 SP1. Or, see KB 4019478 for Windows Server 2008 SP2.
- If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
Quality and reliability improvements
Note Step 4 can occur at any time relative to steps 2 and 3. However, step 4 must occur after step 1. Steps 2–4 must occur before the asynchronous call to UpdatePeer, posted by step 1. This will occur if steps 2–4 all occur in the same button-click handler.
1 Common Language Runtime (CLR)
2 Network Class Library (NCL)
3 Windows Presentation Foundation (WPF)
Additional information about this update
For more information about this update as it relates to Windows 7 SP1 and Windows Server 2008 R2 SP1, see the following article in the Microsoft Knowledge Base:
4103472 May 2018 Preview of the Quality Rollups for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 and 4.7.1 for Windows 7 SP1 and Server 2008 R2 SP1 (KB 4103472)
For more information about this update as it relates to Windows Server 2008, see the following article in the Microsoft Knowledge Base:
4103474 May 2018 Preview of the Quality Rollups for .NET Framework 2.0 SP2, 3.0 SP2, 4.5.2 and 4.6 for Windows Server 2008 (KB 4103474)
If your application serializes or deserializes data by using custom formatters that rely on a specific order of fields in the serialization stream, you might receive an exception error message when trying to deserialize an instance of the CustomAwareComparer object that was serialized on a previous versions of .NET Framework.
The exception error might resemble the following:
Exception type: System.ArgumentException
Message: Object of type 'System.Globalization.CompareOptions' cannot be converted to type 'System.Boolean'.
How to get this 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 automatically, see Windows Update: FAQ.
Microsoft Update Catalog
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.
- For Windows 7 SP1 and Windows Server 2008 R2 SP1, apply update KB 4103472.
- For Windows Server 2008, apply update KB 4103474.
Windows Software Update Services (WSUS)
On your WSUS server, follow these steps:
- Click Start, click Administrative Tools, and then click Microsoft Windows Server Update Services 3.0.
- Expand ComputerName, and then click Action.
- Click Import Updates.
- WSUS opens a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.
- After the ActiveX control is installed, you see the Microsoft Update Catalog screen. Enter 4103472 for Windows 7 SP1 and Windows Server 2008 R2 SP1 or enter 4103474 for Windows Server 2008 in the Search box, and then click Search.
- Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.
- After you select all the packages you require, click View Basket.
- To import the packages to your WSUS server, click Import.
- After the packages are imported, click Close to return to WSUS.
The updates are now available for installation through WSUS.
To apply this update, you must have .NET Framework 4.6, 4.6.1, 4.6.2, 4.7 or 4.7.1 installed.
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