.NET 4.0安装失败，百度经验上那个方法用过，也试过.net清理工具清理后重装，都还是不行，请问怎么解决？

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

CommandLine = D:\879795009f2177ec1b4adf5799dd7df5\\Setup.exe /x86 /x64

Using Simultaneous Download and Install mechanism

Operation: Installing

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

User Experience Data Collection Policy: Disabled

Number of applicable items: 11

Exe (D:\879795009f2177ec1b4adf5799dd7df5\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

ServiceControl operation succeeded!

ServiceControl operation succeeded!

Exe (D:\879795009f2177ec1b4adf5799dd7df5\Windows6.1-KB958488-v6001-x64.msu) failed with 0x240006 - (null).
Exe Log File: CBS.log

Exe (D:\879795009f2177ec1b4adf5799dd7df5\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

MSI (D:\879795009f2177ec1b4adf5799dd7df5\netfx_Core_x64.msi) Installation failed. Msi Log: Microsoft .NET Framework 4 Setup_20150927_155545751-MSI_netfx_Core_x64.msi.txt

Final Result: Installation failed with error code: (0x80070643), "安装时发生严重错误 " (Elapsed time: 0 00:01:45).

你用的什么操纵系统，win7、XP、2003。

到删除程序里把工具栏卸载掉，然后再下一个装上去