I have posted here about the long startup time of my Inventor 2015:
http://forums.autodesk.com/t5/inventor-general-discussion/inventor-2015-takes-40s-for-startup-and-mo...
After a more detailed looking into it, I found that this operation took most of the time from both Inventor starting and first loading of a file in Inventor:
Loading one widow for Inventor (5.0)...
(the message displayed in the status bar)
Does anyone know what's this and is it possible to make this operation taking shorter time?