I had the same issue as well.
You'll need to:
- Launch MO
- Open ini editor
- Select skyrimprefs.ini
- Look for iSize H and iSize W under [Display]
- Change the values to your display size
1920 x 1080 translates into:
iSize H=1080
iSize W= 1920
That did it for me. I also installed DX10 under .../-=SPM 5 redist=-/DirectX10