问题描述 

← Windows功能

  无法安装以下功能:
  .NET Framework 3.5(包括 .NET 2.0 和 3.0)



  无法完成更改。请重新启动你的计算机，然后再试一次。
  错误代码：0x8024402C

 有关如何解决此问题的信息 
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← Windows Features

  The following feature couldn’t be installed:
  .NET Framework 3.5 (includes .NET 2.0 and 3.0)




  The changes couldn’t be completed. Please reboot your computer and try again.
  Error code: 0x8024402C


 Tell me how to solve this problem
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 解决方案一、在线安装

在线安装，需要在联网的情况下进行，framefx.cmd 

@echo off 
Title .NET Framework 3.5 Offline Installer 
for %%I in (D E F G H I J K L M N O P Q R S T U V W X Y Z) do if exist "%%I:\\sources\install.wim" set setupdrv=%%I 
if defined setupdrv ( 
echo Found drive %setupdrv% 
echo Installing .NET Framework 3.5... 
Dism /online /enable-feature /featurename:NetFX3 /All /Source:%setupdrv%:\sources\sxs /LimitAccess 
echo. 
echo .NET Framework 3.5 should be installed 
echo. 
) else ( 
echo No installation media found! 
echo Insert DVD or USB flash drive and run this file once again. 
echo. 
) 
pause

 解决方案二、下载.NET Framework 3.5 本地安装

 .NET Framework 3.5

解决方案三、重装系统