We have a Dell Latitude D600 running XP Pro. Recently, the user switched some setting which caused the following problem: There is a strip across the top of the display about 1/2 inch wide where the cursor may travel, but no window can be moved into. Also, any item on the desktop when moved to that part of the display, will seem to move beneath it. The desktop picture extends to the entire screen (covering the strip) so it is invisible until you try to move something to it. Any ideas? I suspect it is something stupid which I have not thought of yet.