That's the "overscan" area being cut off..
Some TVs allow you to turn off overscan, but then on normal TV you will see the Closed Captioning data and other tweaky stuff...
So the preferred way is to have the video
driver "shrink" the image area. Ususualy there is a page on the video card control panel for "sizing" the display. What it does is lower the actual display resolution by a few pixels on all sides but still outputs the full 1080P to the monitor, that way you can fit the entire screen on the TV.
So hopefully you have at least one of those options to work with.