I just bought Skyrim, and I turned on Ultra settings in the launcher menu and disabled "Windowed Mode." I have the game set to my monitor's native resolution, 1920*1080. I'm running Windows 8.1.
When I start up skyrim either through steam or through the TESV.exe or SkyrimLauncher.exe, after the logo screen appears, a blue window border (very different from the window borders in windows 8.1) appears around the game, and after trying so many different methods and tricks and stuff to no avail, I've given up. This border really ruins the immersion of the game, and is all around annoying. Can anybody help?
In windows, change your refresh rate to 60FPS. Then your desktop will be the same, with the black boarder. Go into catalyst, go into "My digital flat panels" then either "Scaling" or "Overscan" and drag the overscan slider all the way to 0%. Then everything should be normal.
I know this was posted a looong time ago, but someone, somewhere might want to know how to fix this. You must install this mod: http://www.nexusmods.com/skyrim/mods/36177/? as an SKSE plugin. Here is a great video on SKSE: https://www.youtube.com/watch?v=xTGnQIiNVqA. Hope it works for you, worked for me!
Found somebody on steam who had a similar problem. Apparently the solution was:
"To solve it, you have to tick a checkbox in the TESV.exe file properties. Go to there, select compatibility tab and tick on "disable display scaling on high DPI settings"."