Win7 安裝.net framework 4.0 失敗，錯誤HRESULT 0xc8000222解決辦法

之前裝Viusal Stuido 2010 一直失敗，其實在在安裝.net framework 4.0時就失敗……後來就單獨安裝.net framework 4.0，結果還是失敗，出現HRESULT 0xc8000222錯誤代碼，

去官網上查找，發現作如下操作步驟即可

This 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

原來這個還和Windows Update有關系，給目錄名重命名一下再次安裝，即安裝成功了！

轉自:http://www.cnblogs.com/blackcore/archive/2011/09/20/2182043.html