When installing the Windows 7 SDK the install fails and rolls back the installation before showing a failure message
You find this in the log file
SFX C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\SFX\vcredist_x64.exe installation started with log file C:\Users\qjwp\AppData\Local\Temp\Microsoft Windows SDK for Windows 7_0f8d776d-1dab-4e38-b30f-ff0140db5234_SFX.log
C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\SFX\vcredist_x64.exe installation failed with return code 5100
Fix:
Uninstall visual C++ 2010 Resdistributable 2010 ( both X86 and X64 Versions). Then attempt the install again.
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