Description of the security update for the .NET Framework 4.6 and 4.6.1 for Windows 8.1 and Windows Server 2012 R2: April 11, 2017

• All future security and nonsecurity updates for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows RT 8.1-based, Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.
• 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 any Windows Management Instrumentation (WMI) applications returning the following error message:

  Get-WmiObject: The method or operation is not implemented.

  To temporarily disable this update, customers can apply the following registry entry to their system.

  Warning Enabling this registry entry could allow security vulnerabilities including Remote Code Execution.

  Registry entry
  
  • For 32-bit process on 32-bit system and 64-bit process on 64-bit system:
    
    HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319@WMIDisableCOMSecurity=1
  • For 32-bit process on 64-bit system:
    
    HKEY_LOCAL_MACHINE \Software\Wow6432Node\Microsoft\.NETFramework\v4.0.30319@WMIDisableCOMSecurity=1
  Notes

  • This registry entry should be a DWORD entry.

  • This registry entry restores the previous unsecured state.

• For more information about this security update as it relates to Windows 8.1 and Windows Server 2012 R2, see the following article in the Microsoft Knowledge Base:
  
  4014987 Security Only update for the .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, and 4.6.2 updates for Windows 8.1 and Windows Server 2012 R2: April 11, 2017

Method 1: Microsoft Update Catalog

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

Method 2: Windows Software Update Services (WSUS)

1. Click Start, click Administrative Tools, and then click Microsoft Windows Server Update Services 3.0.
2. Expand ComputerName, and then click Action.
3. Click Import Updates.
4. WSUS will open a browser window in which you may be prompted to install an ActiveX control. You must install the ActiveX control to continue.
5. Once the control is installed, you will see the Microsoft Update Catalog screen. Enter 4014987 in the Search box, and then click Search.
6. Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Click Add to add them to your basket.
7. When you have selected all the packages you need, click View Basket.
8. Click Import to import the packages to your WSUS server.
9. Click Close once the packages have been imported to return to WSUS.

The updates are now available for installation through WSUS.

Update deployment information

For deployment details for this security update, go to the following article in the Microsoft Knowledge Base:

Update removal information

Note We do not recommend that you remove any security update. 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 does not replace any previously released update.

• Help for installing updates: Windows Update FAQ
• Security solutions for IT professionals: TechNet Security Support and Troubleshooting
• Help for protecting your Windows-based products and services from viruses and malware: Microsoft Secure
• Local support according to your country: International Support

• Microsoft .NET Framework 4.6 and 4.6.1 when used with:
  • Windows Server 2012 R2
  • Windows 8.1