Hi,
That's unusual that you'd be getting that message. Can you please confirm a few things for me to help debug this issue?
-- Which version of Autodesk Design Review are you attempting to install, 2007 or 2008? (ADR 2008 just went live today).
-- What Operating System are you using? (Windows XP, Vista?)
-- What specific version and service pack of Internet Explorer are you currently using? (You can get this info by opening an Internet Explorer browser window and choosing "About Internet Explorer" from the IE Help menu.
Thanks!
Scott Lillibridge, QA Manager
Extended Design Group
Autodesk, Inc.