修复Microsoft net framework4,0 错误怎么解决

OS Version = 6.1.7601, Platform 2, Service Pack 1
OS Description = Windows 7 - x64 Ultimate Edition Service Pack 1

CommandLine = "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Extended\Setup.exe" /repair /x86 /x64 /parameterfolder Extended

Using Simultaneous Download and Install mechanism

Operation: Repairing

Package Name = Microsoft .NET Framework 4 Extended Setup
Package Version = 4.0.30319

User Experience Data Collection Policy: Disabled

Number of applicable items: 3

MSI (C:\Windows\Microsoft.NET\Framework64\v4.0.30319\SetupCache\Extended\netfx_Extended_x64.msi) Installation failed. Msi Log: Microsoft .NET Framework 4 Extended Setup_20140224_181631661-MSI_netfx_Extended_x64.msi.txt

Final Result: Installation failed with error code: (0x80070643), "安装时发生严重错误 " (Elapsed time: 0 00:00:09).
错误报告

建议：卸载后并清理注册表后，重启再安装

若要对此问题进行故障排除，必须修复 msi 软件更新注册损坏问题或使用 .net framework 清理工具卸载 .net framework 的多个版本，然后重新安装这些组件。