no reinstall for no good reason. It seems that you have on some sort of zoom function in your video card options. Now what if that setting was stored in your registry and you reinstalled and voila the same thing happens because the same settings are used? Now i cant recall the correct names of the options but look out for words like overlay, zoom, or anything that might imply a cropping of video within your video card option. the next thing is to check the options in your software player, many of dvd softwares has options to "fit" widescreen to normal screen format. that means crop and zoom. i think cyberlink calls it pan & scan or something so. nero players also have a similar feature. also nvidia pure video decoder i think has something similar. whatever it is, just set the video to play in its original format.
cdkiller [everything is to be replicate]