<system.webServer>

        <handlers>

            <remove name="SSINC-shtml" />

            <add name="shtml_X64" path="*" verb="*" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness64" />

            <add name="SSINC-shtml" path="*.shtml" verb="GET,POST" modules="IsapiModule" scriptProcessor="C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="Script" preCondition="bitness64" />

        </handlers>

        <defaultDocument>

            <files>

                <add value="index.aspx" />

            </files>

        </defaultDocument>

    </system.webServer>