--- old/src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp	2016-06-20 10:49:16.965439300 +0200
+++ new/src/java.desktop/windows/native/libawt/windows/awt_Robot.cpp	2016-06-20 10:49:16.473096300 +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);