--- old/src/share/vm/opto/library_call.cpp	Tue Feb 25 17:39:24 2014
+++ new/src/share/vm/opto/library_call.cpp	Tue Feb 25 17:39:24 2014
@@ -3236,7 +3236,8 @@
 // private native boolean java.lang.Thread.isInterrupted(boolean ClearInterrupted);
 bool LibraryCallKit::inline_native_isInterrupted() {
   // Add a fast path to t.isInterrupted(clear_int):
-  //   (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int))
+  //   (t == Thread.current() && 
+  //    (!TLS._osthread._interrupted || WINDOWS_ONLY(false) NOT_WINDOWS(!clear_int)))
   //   ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int)
   // So, in the common case that the interrupt bit is false,
   // we avoid making a call into the VM.  Even if the interrupt bit
@@ -3299,6 +3300,12 @@
   Node* bol_arg = _gvn.transform(new (C) BoolNode(cmp_arg, BoolTest::ne));
   IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN);
 
+#ifdef TARGET_OS_FAMILY_windows
+  // To return true on Windows you must read the _interrupted field
+  // and check the the event state i.e. take the slow path. 
+  result_rgn->init_req(no_clear_result_path, top());
+  result_val->init_req(no_clear_result_path, top());
+#else 
   // Second fast path:  ... else if (!clear_int) return true;
   Node* false_arg = _gvn.transform(new (C) IfFalseNode(iff_arg));
   result_rgn->init_req(no_clear_result_path, false_arg);
@@ -3310,6 +3317,7 @@
   // (d) Otherwise, go to the slow path.
   slow_region->add_req(control());
   set_control( _gvn.transform(slow_region));
+#endif
 
   if (stopped()) {
     // There is no slow path.