I just updated my compluter from XP to 7 and installed sldw 2010.  For some reason when I'm in windows explore or opening a new file through sldw i do not get a preview in the preview pane of any prt. asm. or dwg.  I do get an image of the basic prt. asm and dwg. files, but not an acutal preview of the document.  I think it is realated to sldw because I get clear previews when view pdf docs and other files.  Has anyone else had this problem?