Have you noticed a performance issue on creating new files in Inventor? Do you often wait an extraordinary long period of time waiting for the new file dialog to appear? Do you see extra folders appearing in the Create New File dialog that shouldn't be there?
If you do where are your template files located? Are they in a folder directly off of a top level network mapped drive? P:\Templates for example.
If they are move the folder to a level lower e.g. P:\Inventor\Templates and repoint your template setting.
This stops Inventor searching the whole top level directory structure when the New File dialog is called.