Index: /trunk/src/VBox/Runtime/r0drv/nt/initterm-r0drv-nt.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/nt/initterm-r0drv-nt.cpp	(revision 23545)
+++ /trunk/src/VBox/Runtime/r0drv/nt/initterm-r0drv-nt.cpp	(revision 23546)
@@ -63,4 +63,6 @@
 /** SendIpi handler based on Windows version */
 PFNRTSENDIPI                g_pfnrtSendIpi;
+/** KeIpiGenericCall - Windows Server 2003+ only */
+PFNRTKEIPIGENERICCALL       g_pfnrtKeIpiGenericCall;
 
 /** Offset of the _KPRCB::QuantumEnd field. 0 if not found. */
@@ -91,4 +93,5 @@
     g_pfnrtNtHalRequestIpi = NULL;
     g_pfnrtNtHalSendSoftwareInterrupt = NULL;
+    g_pfnrtKeIpiGenericCall = NULL;
 #else
     /*
@@ -107,4 +110,7 @@
     RtlInitUnicodeString(&RoutineName, L"HalSendSoftwareInterrupt");
     g_pfnrtNtHalSendSoftwareInterrupt = (PFNHALSENDSOFTWAREINTERRUPT)MmGetSystemRoutineAddress(&RoutineName);
+
+    RtlInitUnicodeString(&RoutineName, L"KeIpiGenericCall");
+    g_pfnrtKeIpiGenericCall = (PFNRTKEIPIGENERICCALL)MmGetSystemRoutineAddress(&RoutineName);
 #endif
 
Index: /trunk/src/VBox/Runtime/r0drv/nt/internal-r0drv-nt.h
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/nt/internal-r0drv-nt.h	(revision 23545)
+++ /trunk/src/VBox/Runtime/r0drv/nt/internal-r0drv-nt.h	(revision 23546)
@@ -44,5 +44,5 @@
 typedef VOID (__stdcall *PFNHALSENDSOFTWAREINTERRUPT)(ULONG ProcessorNumber, KIRQL Irql);
 typedef int (__stdcall *PFNRTSENDIPI)(RTCPUID idCpu);
-
+typedef ULONG_PTR (__stdcall *PFNRTKEIPIGENERICCALL)(PKIPI_BROADCAST_WORKER BroadcastFunction, ULONG_PTR  Context);
 
 /*******************************************************************************
@@ -55,4 +55,5 @@
 extern PFNHALSENDSOFTWAREINTERRUPT  g_pfnrtNtHalSendSoftwareInterrupt;
 extern PFNRTSENDIPI                 g_pfnrtSendIpi;
+extern PFNRTKEIPIGENERICCALL        g_pfnrtKeIpiGenericCall;
 extern uint32_t                     g_offrtNtPbQuantumEnd;
 extern uint32_t                     g_cbrtNtPbQuantumEnd;
Index: /trunk/src/VBox/Runtime/r0drv/nt/mp-r0drv-nt.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/nt/mp-r0drv-nt.cpp	(revision 23545)
+++ /trunk/src/VBox/Runtime/r0drv/nt/mp-r0drv-nt.cpp	(revision 23546)
@@ -355,7 +355,13 @@
 }
 
+ULONG_PTR rtMpIpiGenericCall(ULONG_PTR  Argument)
+{
+    return 0;
+}
+
 int rtMpSendIpiWin7(RTCPUID idCpu)
 {
-    g_pfnrtNtHalSendSoftwareInterrupt(idCpu, DISPATCH_LEVEL);
+    g_pfnrtKeIpiGenericCall(rtMpIpiGenericCall, 0);
+////    g_pfnrtNtHalSendSoftwareInterrupt(idCpu, DISPATCH_LEVEL);
     return VINF_SUCCESS;
 }