Jase2985: Fix Overscan Using Intel Graphics Driver
If you use Intel Graphics Drivers (i.e. if you have an Intel CPU), then you can use the Intel Graphics Control Panel to fix the overscan on your TV.
Go to the Intel HD Graphics Control Panel (either through the taskbar or by right-clicking on your desktop and finding it there). In the Control Panel click “General Settings,” select the TV from the “Display” dropdown, then click “Customize Aspect Ratio” under Scaling.
Finally, use the sliders in the “Preview” image to the right to adjust the picture until it fits on your TV.
easiest way to to do it on the TV though
On the tv makes it look awful because its enlarging a partial image back up to the full screen with all the artifacts that brings with it. Its part of the reason that broadcast TV looks so chunky compared to real content - the other is interlacing but that's just another bad decision by the broadcast industry that we have to deal with.