[SNIP]

C:\Users\My Name\Code\boost_1_55_0\tools\build\v2\engine>.\bootstrap\jam0 -f build.jam --toolset=vc11 "--toolset-root=C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\Tools\..\..\VC\ "  

...found 159 targets...

...updating 3 targets...

[MKDIR] bin.ntx86

'C:\Users\My' is not recognized as an internal or external command,

operable program or batch file.

    md "bin.ntx86"

[SNIP]