Index: /trunk/src/VBox/HostDrivers/VBoxNetFlt/win/cfg/VBoxNetCfg.cpp
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxNetFlt/win/cfg/VBoxNetCfg.cpp	(revision 41006)
+++ /trunk/src/VBox/HostDrivers/VBoxNetFlt/win/cfg/VBoxNetCfg.cpp	(revision 41007)
@@ -633,5 +633,18 @@
     Pc.enmPcType = enmPcType;
     Pc.hr = S_OK;
-    return VBoxNetCfgWinEnumNetDevices(lpszPnPId, vboxNetCfgWinPropChangeAllNetDevicesOfIdCallback, &Pc);
+    HRESULT hr = VBoxNetCfgWinEnumNetDevices(lpszPnPId, vboxNetCfgWinPropChangeAllNetDevicesOfIdCallback, &Pc);
+    if (!SUCCEEDED(hr))
+    {
+        NonStandardLogFlow(("VBoxNetCfgWinEnumNetDevices failed 0x%x\n", hr));
+        return hr;
+    }
+
+    if (!SUCCEEDED(Pc.hr))
+    {
+        NonStandardLogFlow(("vboxNetCfgWinPropChangeAllNetDevicesOfIdCallback failed 0x%x\n", Pc.hr));
+        return Pc.hr;
+    }
+
+    return S_OK;
 }