Index: /trunk/src/VBox/Devices/Network/slirp/slirp.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/slirp.c	(revision 38043)
+++ /trunk/src/VBox/Devices/Network/slirp/slirp.c	(revision 38044)
@@ -1164,4 +1164,12 @@
             &&  !CHECK_FD_SET(so, NetworkEvents, closefds)
 #endif
+#ifdef NAT_CONNECT_EXPERIMENT
+# ifdef RT_OS_WINDOWS
+            /**
+             * In some cases FD_CONNECT comes with FD_OOB, that confuse tcp processing.
+             */
+            && !WIN_CHECK_FD_SET(so, NetworkEvents, connectfds)
+# endif
+#endif
         )
         {