--- old/src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp	2016-06-29 13:11:59.790740900 +0200
+++ new/src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp	2016-06-29 13:11:59.314725300 +0200
@@ -335,7 +335,17 @@
     } else {
         // get the scancode from the virtual key
         scancode = ::MapVirtualKey(vkey, 0);
-        if (vkey == VK_RMENU) {
+        if (vkey == VK_RMENU ||
+            vkey == VK_DELETE ||
+            vkey == VK_INSERT ||
+            vkey == VK_NEXT ||
+            vkey == VK_PRIOR ||
+            vkey == VK_HOME ||
+            vkey == VK_END ||
+            vkey == VK_LEFT ||
+            vkey == VK_RIGHT ||
+            vkey == VK_UP ||
+            vkey == VK_DOWN) {
             dwFlags |= KEYEVENTF_EXTENDEDKEY;
         }
         keybd_event(vkey, scancode, dwFlags, 0);