diff --git a/Foundation/include/Poco/Platform_WIN32.h b/Foundation/include/Poco/Platform_WIN32.h
index 65bc8299a..4e61a17e4 100644
--- a/Foundation/include/Poco/Platform_WIN32.h
+++ b/Foundation/include/Poco/Platform_WIN32.h
@@ -22,113 +22,6 @@
 #include "Poco/UnWindows.h"
 
 
-#ifndef POCO_FORCE_MIN_WINDOWS_OS_SUPPORT
-	// Determine the real version.
-	// This setting can be forced from UnWindows.h
-	#if defined (_WIN32_WINNT_WINBLUE)
-		//Windows 8.1 _WIN32_WINNT_WINBLUE (0x0602)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WINBLUE
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WINBLUE
-	#elif defined (_WIN32_WINNT_WIN8)
-		//Windows 8	_WIN32_WINNT_WIN8 (0x0602)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WIN8
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WIN8
-	#elif defined (_WIN32_WINNT_WIN7)
-		//Windows 7	_WIN32_WINNT_WIN7 (0x0601)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WIN7
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WIN7
-	#elif defined (_WIN32_WINNT_WS08)
-		//Windows Server 2008 _WIN32_WINNT_WS08 (0x0600)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WS08
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WS08
-	#elif defined (_WIN32_WINNT_VISTA)
-		//Windows Vista	_WIN32_WINNT_VISTA (0x0600)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_VISTA
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_VISTA
-	#elif defined (_WIN32_WINNT_LONGHORN)
-		//Windows Vista	and server 2008 Development _WIN32_WINNT_LONGHORN (0x0600)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_LONGHORN
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION 0x06000000 // hardcoded, VS90 can't find NTDDI_* macros
-	#elif defined (_WIN32_WINNT_WS03)
-		//Windows Server 2003 with SP1,
-		//Windows XP with SP2 _WIN32_WINNT_WS03 (0x0502)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WS03
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WS03
-	#elif defined (_WIN32_WINNT_WINXP)
-		//Windows Server 2003, Windows XP _WIN32_WINNT_WINXP (0x0501)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WINXP
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION NTDDI_WINXP
-	#elif defined (_WIN32_WINNT_WIN2K)
-		//Windows 2000 _WIN32_WINNT_WIN2K (0x0500)
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT _WIN32_WINNT_WIN2K
-	#elif defined (WINVER)
-		// fail back on WINVER
-		#ifdef _WIN32_WINNT
-			#undef _WIN32_WINNT
-		#endif
-		#define _WIN32_WINNT WINVER
-	#elif !defined(_WIN32_WINNT)
-		// last resort = Win XP, SP1 is minimum supported
-		#define _WIN32_WINNT 0x0501
-		#ifdef NTDDI_VERSION
-			#undef NTDDI_VERSION
-		#endif
-		#define NTDDI_VERSION 0x05010100
-	#endif
-#endif // POCO_FORCE_MIN_WINDOWS_OS_SUPPORT
-
-
 #if defined(_MSC_VER) && !defined(POCO_MSVC_SECURE_WARNINGS) && !defined(_CRT_SECURE_NO_DEPRECATE)
 	#define _CRT_SECURE_NO_DEPRECATE
 #endif 
diff --git a/Foundation/include/Poco/UnWindows.h b/Foundation/include/Poco/UnWindows.h
index 59ba2d779..1949235e8 100644
--- a/Foundation/include/Poco/UnWindows.h
+++ b/Foundation/include/Poco/UnWindows.h
@@ -56,34 +56,6 @@
 // definitions.) For more information, see SdkDdkVer.h.
 
 
-#if !defined(_WIN32_WCE)
-#if defined(_WIN32_WINNT)
-	#if (_WIN32_WINNT < 0x0501)
-		#error Unsupported Windows version.
-	#endif
-#elif defined(NTDDI_VERSION)
-	#if (NTDDI_VERSION < 0x05010100)
-		#error Unsupported Windows version.
-	#endif
-#elif !defined(_WIN32_WINNT)
-	// Define minimum supported version.
-	// This can be changed, if needed.
-	// If allowed (see POCO_MIN_WINDOWS_OS_SUPPORT
-	// below), Platform_WIN32.h will do its
-	// best to determine the appropriate values
-	// and may redefine these. See Platform_WIN32.h
-	// for details.
-	#define _WIN32_WINNT 0x0501
-	#define NTDDI_VERSION 0x05010100
-#endif
-#endif
-
-
-// To prevent Platform_WIN32.h to modify version defines,
-// uncomment this, otherwise versions will be automatically
-// discovered in Platform_WIN32.h.
-// #define POCO_FORCE_MIN_WINDOWS_OS_SUPPORT
-
 #if !defined(POCO_NO_WINDOWS_H)
     #include <windows.h>
     #ifdef __MINGW32__
@@ -93,6 +65,7 @@
     #endif // __MINGW32__
 #endif
 
+
 #if !defined(POCO_NO_UNWINDOWS)
 // A list of annoying macros to #undef.
 // Extend as required.