= Install Visual Studio Express 2012 =
[http://msdn.microsoft.com/en-us/library/vstudio/hs24szh9.aspx See versions of VS 2012 here].<br>
Take 32 bit compiling, since a horrible imprecision bug has been reported for 64 bit building. [https://gna.org/bugs/?20821 See bug #20821]. For 64 32 bit compiling, you will only need, '''Visual Studio ProfessionalExpress for Windows Desktop''', since it has: 64-bit x64 compiler.<br>From http://www.microsoft.com/visualstudio/eng/downloads, download and install: [http://go.microsoft.com/?linkid=9810223 9816758 Visual Studio Professional 2012 90-day trialExpress for Windows Desktop].<br>
Skip all extra packages install. After install, just exit any program, which opened after install.
== Bugfix scons for 32bit building - ONLY do this if you have winpython 32 bit. ==
Due to a bug, versions of scons '''<=2.3''' should alter a line in:<br>
'''C:\WinPython27\WinPython-32bit-2.7.4.1\python-2.7.4\Lib\site-packages\scons-2.3.0\SCons\Tool\MSCommonvc.py'''