diff --git a/Lib/distutils/cygwinccompiler.py b/Lib/distutils/cygwinccompiler.py
index 258e138b045..e79e1044248 100644
--- a/Lib/distutils/cygwinccompiler.py
+++ b/Lib/distutils/cygwinccompiler.py
@@ -75,6 +75,18 @@ def get_msvcr():
         elif msc_ver == '1500':
             # VS2008 / MSVC 9.0
             return ['msvcr90']
+        elif msc_ver == '1600':
+            # VS2010 / MSVC 10.0
+            return ['msvcr100']
+        elif msc_ver == '1700':
+            # VS2012 / MSVC 11.0
+            return ['msvcr110']
+        elif msc_ver == '1800':
+            # VS2013 / MSVC 12.0
+            return ['msvcr120']
+        elif msc_ver == '1900':
+            # VS2015 / MSVC 14.0
+            return ['vcruntime140']
         else:
             raise ValueError("Unknown MS Compiler version %s " % msc_ver)
 
diff --git a/Lib/distutils/msvc9compiler.py b/Lib/distutils/msvc9compiler.py
index 33d3e516e9d..8df18f352e9 100644
--- a/Lib/distutils/msvc9compiler.py
+++ b/Lib/distutils/msvc9compiler.py
@@ -183,6 +183,10 @@ def get_build_version():
     s, rest = sys.version[i:].split(" ", 1)
     majorVersion = int(s[:-2]) - 6
     minorVersion = int(s[2:3]) / 10.0
+
+    # There is no majorVersion of 13 (VS2013 == 1800, and VS2015 == 1900)
+    if majorVersion == 13: majorVersion = 14
+
     # I don't think paths are affected by minor version in version 6
     if majorVersion == 6:
         minorVersion = 0
diff --git a/Lib/distutils/msvccompiler.py b/Lib/distutils/msvccompiler.py
index 0e69fd368ca..dc38f382ffa 100644
--- a/Lib/distutils/msvccompiler.py
+++ b/Lib/distutils/msvccompiler.py
@@ -165,6 +165,10 @@ def get_build_version():
     s, rest = sys.version[i:].split(" ", 1)
     majorVersion = int(s[:-2]) - 6
     minorVersion = int(s[2:3]) / 10.0
+
+    # There is no majorVersion of 13 (VS2013 == 1800, and VS2015 == 1900)
+    if majorVersion == 13: majorVersion = 14
+
     # I don't think paths are affected by minor version in version 6
     if majorVersion == 6:
         minorVersion = 0
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index bbb76e605f6..7d1c5a8897a 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -27,7 +27,9 @@
 
 #include "Python.h"
 #include "structseq.h"
-#ifndef MS_WINDOWS
+#ifdef MS_WINDOWS
+#include <Windows.h>
+#else
 #include "posixmodule.h"
 #endif
 
@@ -282,6 +284,14 @@ extern int lstat(const char *, struct stat *);
 #define pclose  _pclose
 #endif /* _MSC_VER */
 
+#if !defined(SEP)
+	#ifdef MS_WINDOWS
+		#define SEP "\\"
+	#else
+		#define SEP "/"
+	#endif
+#endif
+
 #if defined(PYCC_VACPP) && defined(PYOS_OS2)
 #include <io.h>
 #endif /* OS2 */
@@ -533,8 +543,48 @@ _PyInt_FromDev(PY_LONG_LONG v)
 #  define _PyInt_FromDev PyInt_FromLong
 #endif
 
+#if defined _MSC_VER && _MSC_VER >= 1700
+void
+_PyInvalidParameterHandler(const wchar_t* expression, const wchar_t* function, const wchar_t* file, unsigned int line, uintptr_t pReserved)
+{
+}
+
+int
+_PyVerify_fd(int fd)
+{
+	HANDLE hFd;
+	_invalid_parameter_handler oldHandler;
+
+	oldHandler = _set_invalid_parameter_handler(_PyInvalidParameterHandler);
 
-#if defined _MSC_VER && _MSC_VER >= 1400
+	hFd = _get_osfhandle(fd);
+	if (hFd == INVALID_HANDLE_VALUE)
+		goto fail;
+	if ((fd < 0) || _isatty(fd))
+		goto fail;
+
+	// FIXME: ensure that file descriptor is open too
+	_set_invalid_parameter_handler(oldHandler);
+	return 1;
+
+fail:
+	_set_invalid_parameter_handler(oldHandler);
+	return 0;
+}
+
+static int
+_PyVerify_fd_dup2(int fd1, int fd2)
+{
+	_invalid_parameter_handler oldHandler;
+
+	if (!_PyVerify_fd(fd1))
+		return 0;
+	if (fd2 < 0)
+		return 0;
+	return 1;
+}
+
+#elif defined _MSC_VER && _MSC_VER >= 1400
 /* Microsoft CRT in VS2005 and higher will verify that a filehandle is
  * valid and raise an assertion if it isn't.
  * Normally, an invalid fd is likely to be a C program error and therefore
@@ -5377,6 +5427,10 @@ win32_popen4(PyObject *self, PyObject  *args)
     return f;
 }
 
+#if !defined(SEP)
+#define SEP "\\"
+#endif
+
 static BOOL
 _PyPopenCreateProcess(char *cmdstring,
                       HANDLE hStdin,
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index 61b8d612a4a..36cbdbc9337 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -160,6 +160,10 @@ time_clock(PyObject *self, PyObject *unused)
 #endif /* HAVE_CLOCK */
 
 #if defined(MS_WINDOWS) && !defined(__BORLANDC__)
+#include <time.h>
+#define timezone _timezone
+#define daylight _daylight
+#define tzname _tzname
 /* Due to Mark Hammond and Tim Peters */
 static PyObject *
 time_clock(PyObject *self, PyObject *unused)