I've installed Microsoft Visual Studio 10.0. Here are the steps I've been taking.
My python version is Python 3.4.2 (v3.4.2:ab2c023a9432, Oct 6 2014, 22:16:31) [MSC v.1600 64 bit (AMD64)] on win32. (Sorry for the long output.) >cd "c:\Program Files (x86)\Microsoft Visual Studio 10.0"\vc >vcvarsall.bat > >SET VS90COMNTOOLS=%VS100COMNTOOLS% c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC>pip install scandir Collecting scandir Using cached scandir-0.9.tar.gz Installing collected packages: scandir Running setup.py install for scandir building '_scandir' extension C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Ic:\Python34\include -Ic:\Python34\include /Tc_scandir.c /Fobuild\temp.win-amd64-3.4\Release \_scandir.obj _scandir.c C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\link.exe /DLL /nologo /INCREMENTAL:NO /LIBPATH:c:\Python34\libs /LIBPATH:c:\Python34\PCbuild\amd64 /EXPORT:PyInit__scandir build\temp.win -amd64-3.4\Release\_scandir.obj /OUT:build\lib.win-amd64-3.4\_scandir.pyd /IMPLIB:build\temp.win-amd64-3.4\Release\_scandir.lib /MANIFESTFILE:build\temp.win-amd64-3.4\Release\_scandir.pyd.manifest Creating library build\temp.win-amd64-3.4\Release\_scandir.lib and object build\temp.win-amd64-3.4\Release\_scandir.exp _scandir.obj : error LNK2001: unresolved external symbol _PyObject_SelfIter _scandir.obj : error LNK2001: unresolved external symbol _PyObject_GenericGetAttr _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_WarnEx referenced in function _win32_warn_bytes_api _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_DeprecationWarning referenced in function _win32_warn_bytes_api _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Occurred referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyBytes_FromObject referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Clear referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_ValueError referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyUnicode_AsUnicodeAndSize referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyUnicode_FromObject referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Format referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_TypeError referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp___Py_NoneStruct referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromUnsignedLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyFloat_FromDouble referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromUnsignedLongLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyStructSequence_New referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyEval_RestoreThread referenced in function __fi_close _scandir.obj : error LNK2019: unresolved external symbol __imp__PyEval_SaveThread referenced in function __fi_close _scandir.obj : error LNK2019: unresolved external symbol __imp__Py_BuildValue referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_SetFromWindowsErr referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_NoMemory referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_SetNone referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_StopIteration referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyObject_Free referenced in function _fi_dealloc _scandir.obj : error LNK2019: unresolved external symbol __imp___PyObject_New referenced in function __iterfile _scandir.obj : error LNK2019: unresolved external symbol __imp__PyArg_ParseTupleAndKeywords referenced in function _scandir_helper _scandir.obj : error LNK2019: unresolved external symbol __imp__PyStructSequence_InitType referenced in function _PyInit__scandir _scandir.obj : error LNK2019: unresolved external symbol __imp__PyType_Ready referenced in function _PyInit__scandir _scandir.obj : error LNK2019: unresolved external symbol __imp__PyModule_Create2 referenced in function _PyInit__scandir build\lib.win-amd64-3.4\_scandir.pyd : fatal error LNK1120: 31 unresolved externals error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\BIN\\link.exe' failed with exit status 1120 Complete output from command c:\Python34\python.exe -c "import setuptools, tokenize;__file__='C:\\Users\\SBO010\\AppData\\Local\\Temp\\pip-build-gd_12t27\\scandir\\setup.py';exec(compile(getattr(t okenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\SBO010\AppData\Local\Temp\pip-tzadruqn-record\install-record.txt --single-version-externall y-managed --compile: running install running build running build_py creating build creating build\lib.win-amd64-3.4 copying scandir.py -> build\lib.win-amd64-3.4 running build_ext building '_scandir' extension creating build\temp.win-amd64-3.4 creating build\temp.win-amd64-3.4\Release C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Ic:\Python34\include -Ic:\Python34\include /Tc_scandir.c /Fobuild\temp.win-amd64-3.4\Release \_scandir.obj _scandir.c C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\link.exe /DLL /nologo /INCREMENTAL:NO /LIBPATH:c:\Python34\libs /LIBPATH:c:\Python34\PCbuild\amd64 /EXPORT:PyInit__scandir build\temp.win -amd64-3.4\Release\_scandir.obj /OUT:build\lib.win-amd64-3.4\_scandir.pyd /IMPLIB:build\temp.win-amd64-3.4\Release\_scandir.lib /MANIFESTFILE:build\temp.win-amd64-3.4\Release\_scandir.pyd.manifest Creating library build\temp.win-amd64-3.4\Release\_scandir.lib and object build\temp.win-amd64-3.4\Release\_scandir.exp _scandir.obj : error LNK2001: unresolved external symbol _PyObject_SelfIter _scandir.obj : error LNK2001: unresolved external symbol _PyObject_GenericGetAttr _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_WarnEx referenced in function _win32_warn_bytes_api _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_DeprecationWarning referenced in function _win32_warn_bytes_api _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Occurred referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyBytes_FromObject referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Clear referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_ValueError referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyUnicode_AsUnicodeAndSize referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyUnicode_FromObject referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_Format referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_TypeError referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp___Py_NoneStruct referenced in function _path_converter _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromUnsignedLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyFloat_FromDouble referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromUnsignedLongLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyLong_FromLong referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyStructSequence_New referenced in function _find_data_to_statresult _scandir.obj : error LNK2019: unresolved external symbol __imp__PyEval_RestoreThread referenced in function __fi_close _scandir.obj : error LNK2019: unresolved external symbol __imp__PyEval_SaveThread referenced in function __fi_close _scandir.obj : error LNK2019: unresolved external symbol __imp__Py_BuildValue referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_SetFromWindowsErr referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_NoMemory referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyErr_SetNone referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyExc_StopIteration referenced in function __fi_next _scandir.obj : error LNK2019: unresolved external symbol __imp__PyObject_Free referenced in function _fi_dealloc _scandir.obj : error LNK2019: unresolved external symbol __imp___PyObject_New referenced in function __iterfile _scandir.obj : error LNK2019: unresolved external symbol __imp__PyArg_ParseTupleAndKeywords referenced in function _scandir_helper _scandir.obj : error LNK2019: unresolved external symbol __imp__PyStructSequence_InitType referenced in function _PyInit__scandir _scandir.obj : error LNK2019: unresolved external symbol __imp__PyType_Ready referenced in function _PyInit__scandir _scandir.obj : error LNK2019: unresolved external symbol __imp__PyModule_Create2 referenced in function _PyInit__scandir build\lib.win-amd64-3.4\_scandir.pyd : fatal error LNK1120: 31 unresolved externals error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 10.0\\VC\\BIN\\link.exe' failed with exit status 1120 ---------------------------------------- Command "c:\Python34\python.exe -c "import setuptools, tokenize;__file__='C:\\Users\\SBO010\\AppData\\Local\\Temp\\pip-build-gd_12t27\\scandir\\setup.py';exec(compile(getattr(tokenize, 'open', ope n)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\SBO010\AppData\Local\Temp\pip-tzadruqn-record\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\SBO010\AppData\Local\Temp\pip-build-gd_12t27\scandir c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC> -- https://mail.python.org/mailman/listinfo/python-list