Description of Security and Quality Rollup for .NET Framework 4.5.2 for Windows Server 2012 (KB 4054991)

This update is included in the February 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 (KB 4074806). Parts of this update were previously included in the Security and Quality rollup (KB 4076493) on February 13, 2018, and in the Preview of Quality rollup (KB 4057271) on January 17, 2018.

This update for Windows Server 2012 includes cumulative reliability improvements in .NET Framework 4.5.2. 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

• 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.

For .NET Framework 4.5.2

¹ Active Server Pages (ASP.NET)

For more information about this update as it relates to Windows Server 2012, see the following articles in the Microsoft Knowledge Base:

4074806 February 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 (KB 4074806)

4076493 Security and Quality Rollup for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 (KB 4076493)

4057271 January 2018 Preview of the Quality Rollups for .NET Framework 3.5 SP1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, and 4.7.1 for Windows Server 2012 (KB 4057271)

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 automatically, see Windows Update: FAQ.

Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

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 will open a browser window in which you may be prompted to install an ActiveX control. Install the ActiveX control to continue.
5. After the ActiveX control is installed, you will see the Microsoft Update Catalog screen. Enter 4074806 in 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. When you have selected all the packages that you need, select View Basket.
8. Select Import to import the packages to your WSUS server.
9. Select Close after the packages have been imported to return to WSUS.

The updates are now available for installation through WSUS.

Prerequisites

To apply this update, you must have .NET Framework 4.5.2 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 updates KB 4042077, KB 4035037 and KB 4057271.

File information