EDIT try this link first and click Start once the pane loads:
From CADsoft consulting:
Go to http://www.autodesk.com/
select the Customer Service button at the bottom of the home page.
Select the ASK button on the next page and the Virtual Agent will launch giving you access to a Download Links selection, as well as other choices.
Interestingly, the Virtual Agent also has a “Top 10 Downloads of the Week” option. The result is pretty interesting: