Missing x64 build tools. Solution: Re-run Windows SDK v7.1 installer and repair the “Developer Tools – x64 Compilers” feature.
Open the from Start Menu. Type:
Note: There’s a known issue with the SDK’s x64 compiler setup – you may need the hotfix from Microsoft. Microsoft Visual Studio 2010 64 Bit Prerequisites X64
Then check for x64 by navigating:
To verify the output: Build a simple “Hello World” as x64, then use dumpbin /headers Release\app.exe – you should see x64 under FILE HEADER MACHINE. Missing x64 build tools
