Index: src/OFSystemInfo.h
==================================================================
--- src/OFSystemInfo.h
+++ src/OFSystemInfo.h
@@ -56,10 +56,13 @@
 @property (class, readonly, nonatomic) bool supportsSHAExtensions;
 # endif
 # if defined(OF_POWERPC) || defined(OF_POWERPC64) || defined(DOXYGEN)
 @property (class, readonly, nonatomic) bool supportsAltiVec;
 # endif
+# ifdef OF_WINDOWS
+@property (class, readonly, nonatomic, getter=isWindowsNT) bool windowsNT;
+# endif
 #endif
 
 /*!
  * @brief Returns the size of a page.
  *
@@ -284,11 +287,22 @@
  *
  * @return Whether the CPU and OS support AltiVec
  */
 + (bool)supportsAltiVec;
 #endif
+
+#ifdef OF_WINDOWS
+/*!
+ * @brief Returns whether the application is running on Windows NT.
+ *
+ * @note This method is only available on Windows.
+ *
+ * @return Whether the application is running on Windows NT
+ */
++ (bool)isWindowsNT;
+#endif
 
 + (instancetype)alloc OF_UNAVAILABLE;
 - (instancetype)init OF_UNAVAILABLE;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/OFSystemInfo.m
==================================================================
--- src/OFSystemInfo.m
+++ src/OFSystemInfo.m
@@ -662,11 +662,18 @@
 # endif
 
 	return false;
 }
 #endif
+
+#ifdef OF_WINDOWS
++ (bool)isWindowsNT
+{
+	return !(GetVersion() & 0x80000000);
+}
+#endif
 
 - (instancetype)init
 {
 	OF_INVALID_INIT_METHOD
 }
 @end