Hi Dave - if you turn off multithreading in the display engine it should fix that, it seems that the video driver with the surface 3 is sensitive to multiple threads being used.

See here for how to set it: http://moi3d.com/forum/index.php?webtag=MOI&msg=7385.3 , you need to edit moi.ini and set DisplayThreadLimit=1 in there.

Please let me know if that improves things for you.

- Michael