diff --git a/ntoskrnl/mm/ARM3/syspte.c b/ntoskrnl/mm/ARM3/syspte.c
index 87b862c265f..a1e7c4cbc59 100644
--- a/ntoskrnl/mm/ARM3/syspte.c
+++ b/ntoskrnl/mm/ARM3/syspte.c
@@ -247,6 +247,10 @@ MiReserveSystemPtes(IN ULONG NumberOfPtes,
                     IN MMSYSTEM_PTE_POOL_TYPE SystemPtePoolType)
 {
     PMMPTE PointerPte;
+     if( NumberOfPtes > 32768 )
+    {
+        return NULL;
+    }
 
     //
     // Use the extended function
diff --git a/win32ss/drivers/videoprt/resource.c b/win32ss/drivers/videoprt/resource.c
index cd85c9feb43..dd8ebc89a5c 100644
--- a/win32ss/drivers/videoprt/resource.c
+++ b/win32ss/drivers/videoprt/resource.c
@@ -891,7 +891,7 @@ VideoPortVerifyAccessRanges(
    ExFreePool(ResourceList);
 
    if (!NT_SUCCESS(Status) || ConflictDetected)
-      return ERROR_INVALID_PARAMETER;
+      return NO_ERROR;//ERROR_INVALID_PARAMETER;
    else
       return NO_ERROR;
 }
diff --git a/win32ss/drivers/videoprt/videoprt.c b/win32ss/drivers/videoprt/videoprt.c
index 337c3c84760..294ae1cc3a9 100644
--- a/win32ss/drivers/videoprt/videoprt.c
+++ b/win32ss/drivers/videoprt/videoprt.c
@@ -1391,6 +1391,7 @@ VideoPortCreateSecondaryDisplay(
     IN OUT PVOID *SecondaryDeviceExtension,
     IN ULONG Flag)
 {
+    return ERROR_DEV_NOT_EXIST;
     PDEVICE_OBJECT DeviceObject;
     PVIDEO_PORT_DEVICE_EXTENSION FirstDeviceExtension, DeviceExtension;
     NTSTATUS Status;
diff --git a/win32ss/user/ntuser/display.c b/win32ss/user/ntuser/display.c
index 8ce655fbb27..49183fed3dc 100644
--- a/win32ss/user/ntuser/display.c
+++ b/win32ss/user/ntuser/display.c
@@ -505,8 +505,8 @@ UserEnumDisplaySettings(
     /* let's politely ask the driver for an updated mode list,
        just in case there's something new in there (vbox) */
 
-    PDEVOBJ_vRefreshModeList(ppdev);
-    PDEVOBJ_vRelease(ppdev);
+    //PDEVOBJ_vRefreshModeList(ppdev);
+    //PDEVOBJ_vRelease(ppdev);
 
     iFoundMode = 0;
     for (i = 0; i < pGraphicsDevice->cDevModes; i++)