My primary laptop is out for repair and I was using my backup - which is a 3 or 4 year old Dell Latitude X1 running xp pro. I have not used this laptop for several months and I fired it up and my XP window size is not using the whole screen. The physical screen size is 10 1/4" W x 6 1/4" H, 12" diagonal. Normally the xp window would fill the entire screen. But now it is shrunk so I have a 1" black bar on both sides of the window so the window height is still the same but the width is 8 1/4". Obviously some internal widow dimension size has been altered in the OS, but I have no idea what was changed. I have not been messing with the OS or the registry so I am at a loss.