I had a similar problem. When I updated video codecs it works fine. Try uninstall or update codec pack.
Look at these thread on forums.ubi.com. My problem was in ffdshow filter.
BLACK SCREEN AFTER FIRST LOAD
Strange menu bug.
If you are using an older version "k-lite codec pack" just run "K-lite Codec Tweak Tool" and check option: "Disable the following filter - ffdshow"
Of course, if later you want to watch a movie on your computer (avi, wmv, mpeg.. etc.) - just unchek this option again. But simply - to upgrade videocodecs.
I hope it helps.