Verifique o arquivo de registros. Você pode precisar fazer um Controle F (encontrar) para a palavra fail
.
Neste caso, mostrou
07:20:40 24 September 2014: C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\SFX\vcredist_x64.exe installation failed with return code 5100
Uma rápida pesquisa no Google leva-me ao link
E os principais bits do site são:
This issue occurs when you install the Windows 7 SDK on a computer that has a newer version of the Visual C++ 2010 Redistributable installed. The Windows 7 SDK installs version 10.0.30319 of the Visual C++ 2010 Redistributable.
To resolve this issue, you must uninstall all versions of the Visual C++ 2010 Redistributable before installing the Windows 7 SDK. You may have one or more of the following products installed: