diff --git a/win32ss/user/ntuser/window.c b/win32ss/user/ntuser/window.c
index 1c2b0474c08..c5b3111c5ba 100644
--- a/win32ss/user/ntuser/window.c
+++ b/win32ss/user/ntuser/window.c
@@ -313,6 +313,8 @@ IntWinListOwnedPopups(PWND Window)
     HWND *List;
     UINT Index, NumOwned = 0;
 
+    ERR("IntWinListOwnedPopups(Window = 0x%p)\n", Window);
+
     Desktop = co_GetDesktopWindow(Window);
     if (!Desktop)
         return NULL;
@@ -323,6 +325,8 @@ IntWinListOwnedPopups(PWND Window)
             ++NumOwned;
     }
 
+    ERR("NumOwned = %u\n", NumOwned);
+
     List = ExAllocatePoolWithTag(PagedPool, (NumOwned + 1) * sizeof(HWND), USERTAG_WINDOWLIST);
     if (!List)
     {
@@ -331,14 +335,23 @@ IntWinListOwnedPopups(PWND Window)
         return NULL;
     }
 
+    ERR("List = 0x%p\n", List);
+
     Index = 0;
     for (Child = Desktop->spwndChild; Child; Child = Child->spwndNext)
     {
         if (Child->spwndOwner == Window)
+        {
             List[Index++] = Child->head.h;
+
+            ERR("Child = 0x%p\n", Child);
+            ERR("Child->spwndOwner = 0x%p\n", Child->spwndOwner);
+        }
     }
     List[Index] = NULL;
 
+    ERR("Index = %u, List[Index] = 0x%p\n", Index, List[Index]);
+
     return List;
 }
 
@@ -2806,11 +2819,21 @@ VOID FASTCALL IntDestroyOwnedWindows(PWND Window)
     if (!List)
         return;
 
+    ERR("IntDestroyOwnedWindows(Window = 0x%p), the list is not NULL\n", Window);
+    ERR("List = 0x%p\n", List);
+
     for (phWnd = List; *phWnd; ++phWnd)
     {
+        ERR("phWnd = 0x%p, *phWnd = 0x%p\n", phWnd, *phWnd);
+        ERR("List = 0x%p\n", List);
+
         pWnd = ValidateHwndNoErr(*phWnd);
         if (pWnd == NULL)
             continue;
+
+        ERR("pWnd = 0x%p\n", pWnd);
+        ERR("pWnd->spwndOwner = 0x%p\n", pWnd->spwndOwner);
+
         ASSERT(pWnd->spwndOwner == Window);
         ASSERT(pWnd != Window);