Screen Resolution Change - hard to describe
I took a break from ME3 a couple months ago and recently returned to a very unusual occurance that's not that easy to decribe so please bare with me here.
When I played ME3 before (in fact I have all 3 mass effect titles installed on this PC and the problem has spread to all of them as well) I played it at my PCs max resolution (1366x768) and in the title screen, main menu, and loading screens the game would have a significant black boarder. When I took a break from Mass Effect to play TOR for a while, the borders were all there; now I'm trying to come back and they are not present.
The result is that the game is significantly magnified and operating either in a quazi-widescreen mode or in a complete fullscreen mode (like running a widescreen DVD on a TV that only fits fullscreen stuff) in relation to what it used to be and no matter how I adjust the in-game settings I cannot bring back the heavy borders that used to be present.
Has anybody else experienced this or know what I'm talking about?
EDIT:
Well I was thinking about this last night and thought of a different way to describe it that might make a bit more sense (at least with ME1 and ME2).
Those games never played at max resolution particularly well so I played them at a lower res and the games would resize within my screen to what they were set to, with the remaining unused space just existing as a large black border to the game. Now the game is stretched to fill the entire screen no matter what resolution the games are set at.
This doesn't apply quite so much to mass effect 3 since I actually was playing that at max resolution, but if I could fix the other two games without having to uninstall and loose profile data and safe games then I'd take it.
This seems to be a monitor issue instead of a Mass Effect / OS issue. Did you by any chance change monitors? Usually there should be a monitor setting of "pass through" or "no rescaling" or "native" in its menu so that the monitor won't scale the picture to fit the screen but outputs pixel-per-pixel (which would result in the black borders you described).
Usually these distortions are due to a "fit-to-screen" setting. There may be a "fit-to-aspect-ratio" setting that should enlarge the picture, but not distort the aspect ratio.