The Windows Server Update Services console gives Unexpected Error after KB3159706

The Services console gives after

Solution:
Manual steps required to complete the installation of this update

  1. Open an elevated Command Prompt window, and then run the following command (case sensitive, assume “C” as the system volume):
    "C:\Program Files\Update Services\\wsusutil.exe" postinstall /servicing
  2. Select HTTP Activation under .NET Framework 4.5 Features in the Server Manager Add Roles and Features wizard.

    HTTP activation

  3. Restart the service.

If is enabled on the WSUS server

  1. Assign ownership of the Web.Config file to the administrators group (run at an elevated command prompt):
    takeown /f web.config /a
    
    icacls "C:\Program Files\Update Services\WebServices\ClientWebService\Web.config" /grant administrators:f
  2. Locate the Web.Config file in the following path:
    C:\Program Files\Update Services\WebServices\ClientWebService\Web.Config
  3. Make the following changes in the file.

    Note This code sample represents a single text block. The line spacing is used only to emphasize the text changes, which are shown in bold.

    <services>
              <service
                    name=".UpdateServices.Internal.Client"
                    behaviorConfiguration="ClientWebServiceBehaviour">
                   <!-- 
                      These 4 endpoint bindings are required for supporting both http and https
                    -->
                    <endpoint address=""
                            binding="basicHttpBinding"
                            bindingConfiguration="SSL"
                            contract="Microsoft.UpdateServices.Internal.IClientWebService" />
                    <endpoint address="secured"
                            binding="basicHttpBinding"
                            bindingConfiguration="SSL"
                            contract="Microsoft.UpdateServices.Internal.IClientWebService" />
                   <endpoint address=""
                            binding="basicHttpBinding"
                            bindingConfiguration="ClientWebServiceBinding"
                            contract="Microsoft.UpdateServices.Internal.IClientWebService" />
                    <endpoint address="secured"
                            binding="basicHttpBinding" 
                            bindingConfiguration="ClientWebServiceBinding"
                            contract="Microsoft.UpdateServices.Internal.IClientWebService" />
              </service>
        </services>
  4. Add the multipleSiteBindingsEnabled=”true” attribute to the bottom of the Web.Config file, as shown:
    </bindings>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
    </system.serviceModel>

https://support.microsoft.com/en-us/kb/3159706