Win7不能安装.Net4.0的解决方法

最近在给一个客户安装木门管理软件时，客户使用的是win7的系统，.net 4.0始终安装不成功，按下面的方法解决了。

WIN7 安装不了 .net 4.0This behavior may occur if the temporary folder of Windows Update has been corrupted. We can refer to the following steps to rename this folder. Please be assured the folder will be created again when we visit the Windows Update site again.

1. Click Start, Run, type: cmd and press Enter. Please run the following command in the opened window.

net stop WuAuServ

2. Click Start, Run, type: %windir% and press Enter.
3. In the opened folder, rename the folder SoftwareDistribution to SDold.
4. Click Start, Run, type: cmd and press Enter.

Please run the following command in the opened window.

net start WuAuServ
主要原因是windows update的临时文件损坏 建议重命名该文件夹

步骤 1.开始—– 运行——- cmd —– 键入net stop WuAuServ回车（停止windows update服务）

2.开始—– 运行—-键入%windir%回车（打开系统目录）

3.将SoftwareDistribution文件夹重命名为SDold

4.开始—– 运行——- cmd —– 键入net start WuAuServ回车

5.可以正常安装.net了