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错误 1
Installing Visual Studio 2010 SP1 fails with Generic Trust Failure 
Installation did not succeed. Microsoft Visual Studio 2010 Service Pack 1 has not been installed because:
Generic Trust Failure.
解决方案：I had the same problem - it was related to the expiration of certificate inside the Service Pack package. Try to change your system date to February 1st, 2011. More details see here:http://social.msdn.microsoft.com/Forums/en-US/vssetup/thread/acb22961-1cde-488c-a856-eaa32337599a/
这儿是因为sp1包中证书的问题，把系统时间调到2011年之前。最好断网，然后安装，如果发现还是报错Generic Trust Failure 则是因为缓存的问题，可能在用户的AppData/Temp文件夹下，
删除，重新安装。
参考：http://stackoverflow.com/questions/9188447/visual-studio-2010-service-pack-1-is-not-installing
http://social.msdn.microsoft.com/Forums/en-US/vssetup/thread/acb22961-1cde-488c-a856-eaa32337599a/
错误 2
To install Microsoft Visual Studio 2010 SP1 is required before download of archives the "microsoft visual c++ 2010 x86 runtime 10.0.40219" disk, where browse a .msi arquive in windows explorer. But, the installer distributed by Microsoft to "microsoft visual c++ 2010 x86 runtime 10.0.40219" is vcredist_x86.exe.
Insert the "microsoft visual c++ 2010 x86 runtime 10.0.40219" disk and click OK
这儿提示找不到文件要求输入c++2010的安装包。但是我们点击浏览就会发现这儿需要的是一个Vc_runtime_x86.msi文件，这个文件在我们从离线安装包中提取出来的文件中有，我们搜索找到这个
文件，然后发现在该文件夹下有四个文件 Vc_runtime_x86.msi Vc_runtime_x86.cab Vc_runtime_x64.msi Vc_runtime_x64.cab 将browse定位到该文件下即可，如果在该文件夹下发现只有两个，
重新解压iso文件在里面找到这四个文件就可以。然后类似找不到文件的报错以此类推.
最终安装完成:提示Reapplication is complete;
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原文地址：http://www.cnblogs.com/santian/p/4779782.html
