I just got my Windows 7 Lenovo laptop from being repaired (which included reinstalling the factory software). I have the laptop plugged into my large (20") Asus external monitor via a VGA plug. For the first time ever, the display on both my laptop and the external monitor is a 4:3 format that is much smaller than the screens. On the laptop, there is about an inch and a half black bar on the left and right of the display, and on the monitor there are about 4" on the left and right and 2" top and bottom... making the displays unusable without magnifying glasses. I can't find any settings to fill the screens with the display. Please help.