Index: /trunk/src/VBox/Runtime/r3/win/ldrNative-win.cpp
===================================================================
--- /trunk/src/VBox/Runtime/r3/win/ldrNative-win.cpp	(revision 46699)
+++ /trunk/src/VBox/Runtime/r3/win/ldrNative-win.cpp	(revision 46700)
@@ -50,4 +50,7 @@
     Assert(sizeof(*phHandle) >= sizeof(HMODULE));
     AssertReturn(fFlags == 0 || fFlags == RTLDRLOAD_FLAGS_NO_UNLOAD, VERR_INVALID_PARAMETER);
+    AssertLogRelMsgReturn(RTPathStartsWithRoot(pszFilename),  /* Relative names will still be applied to the search path. */
+                          ("pszFilename='%s'\n", pszFilename),
+                          VERR_INTERNAL_ERROR_2);
 
     /*