I had the same problem when I got my first NUC. It turned out to be the aspect setting on my tv. Most tvs are set to 'auto' by default. You want to set the aspect to 'dot-to-dot' for PC use. Otherwise you'll get the cut-off like in the picture. You should have a button on your remote to switch between different aspect settings.
I hope this helps.
Jason Hoffman (Intel employee and NUC owner)
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I had a similar problem, running Windows 8.1 Pro on my D54250WYK. The over scan cut off the edges of the screen on the Windows desktop.
I was running the NUC through an Onkyo NR-808 receiver to my Samsung PN59D7000 plasma. The Intel Graphics software offered an option to resize the screen, but if new settings were applied, the screen would not adjust. I took the HDMI cable from the NUC and ran it directly to the Samsung. The resizing worked. I switched back to the Onkyo: same original problem, no matter whether I set the Onkyo to 4:3, "Full" or "Auto".
I then found a picture adjustment on the Samsung called "screen fit". Using that, the picture is scaled perfectly running though the Onkyo.
Hope this helps Samsung and Onkyo owners using the D54250WYK, or other NUC's.