Guessing youre using an intel gfx card, i had the same problem on my old laptop, there was never any fix, i did a rough and ready fix by just removing the reflections from the ocean surface, not sure if its still hosted anywhere though.
Original thread
http://www.subsim.com/radioroom/showthread.php?t=148215
Attempted fix and other discussions
http://www.subsim.com/radioroom/showthread.php?t=157068
http://www.subsim.com/radioroom/show...el+reflections