错误日志:
[02/25/11,18:58:28] Microsoft .NET Framework 4: [2] Error code -939523550 for this component is not recognized.
[02/25/11,18:58:28] Microsoft .NET Framework 4: [2] Component Microsoft .NET Framework 4 returned an unexpected value.
试过单独去下载.net4.0安装程序,也是安装错误提示error code: (0xC8000222)