I had this problem before and with a recent reinstall of Skyrim and the Creation Kit it still won't work? I also can't find this problem anywhere..

Thanks for the help if any.

Edit: This is what it looks like when I right click and select preview on any object: http://i.imgur.com/drsCfPy.png

Are you using ENB? Try removing d3d9.dll and restarting the CK.