Question

安装Microsoft .NET Framework 4时，发生严重错误，win7 64位系统 求高手解答！

Installation Log
Message Types: Errors Verbose Messages
Message Details: Date Time
© 2009 Microsoft Corporation. All rights reserved. Terms of Use.
OS Version = 6.1.7601, Platform 2, Service Pack 1
安装错误日志
OS Description = Windows 7 - x64 Ultimate Edition Service Pack 1

CommandLine = F:\fd6ff56e9f2221899233b9dc8a0d\\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 (F:\fd6ff56e9f2221899233b9dc8a0d\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

ServiceControl operation succeeded!

ServiceControl operation succeeded!

Exe (F:\fd6ff56e9f2221899233b9dc8a0d\Windows6.1-KB958488-v6001-x64.msu) failed with 0x240006 - (null).

Exe (F:\fd6ff56e9f2221899233b9dc8a0d\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

MSI (F:\fd6ff56e9f2221899233b9dc8a0d\netfx_Core_x64.msi) Installation failed. Msi Log: Microsoft .NET Framework 4 Setup_20140202_234624341-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 00:01:43)
求大神！！！！！！！！

Answer 1

1、开始->运行->net stop WuAuServ
2、开始->运行->%windir%
3、将文件夹SoftwareDistribution重命名为SDold
4、开始->运行->net start WuAuServ
如果不能重命名，重启一下电脑在重命名就好了。
之后再重新装.net4就能装了。
PS：win+r 打开Windows7的“运行”。