如何在Windows Server 2012 R2中的IIS 8.5上注册Dot net framewo

如果它是早期的框架版本(2.0,3.5等)&在早期的服务器(对于Eg Windows 2003),我会输入以下命令
在适当的路径.

C:WindowsMicrosoft.NETFramework64v4.0.30319>aspnet_regiis -i

但是,我在此服务器上找不到4.6.2的文件夹路径. &安培;甚至从这里安装此命令会给出以下消息：

Microsoft (R) ASP.NET RegIIS version 4.0.30319.0 Administration
utility to install and uninstall ASP.NET on the local machine.
Copyright (C) Microsoft Corporation. All rights reserved. Start
installing ASP.NET (4.0.30319.0). This option is not supported on
this version of the operating system. Administrators should instead
install/uninstall ASP.NET 4.5 with IIS8 using the “Turn Windows
Features On/Off” dialog,the Server Manager management tool,or the
dism.exe command line tool. For more details please see
07001. Finished installing
ASP.NET (4.0.30319.0).

我知道消息中的Web链接是4.5,因为4.5是4.0的就地升级.

我的网站给出了这个错误：

The ‘targetFramework’ attribute in the element of the
Web.config file is used only to target version 4.0 and later of the
.NET Framework (for example,”).
The ‘targetFramework’ attribute currently references a version that is
later than the installed version of the .NET Framework. Specify a
valid target version of the .NET Framework,or install the required
version of the .NET Framework.

web.config的相关部分是：

<system.web>
    <compilation debug="true" targetFramework="4.6.2"/>
    <httpRuntime targetFramework="4.6.2"/>
</system.web>