We just installed IronCAD on several machines and found this problem (launching IronCAD launches "Microsoft Install" window for Outlook.)
We canceled the install window, and IronCAD seems to run ok, but still got the message every time we started a new IronCAD session.
On an NT4.0 machine with this problem, we launched Outlook (with IronCAD not up) got the install message, went ahead with the install, (basically creating an Outlook .pst for the user.) Then exited Outlook.
Now IronCAD launches without problem. Seems to be the fix. We have the problem on Windows2000, and WindowsXP, and will be testing this fix today. Will follow up with an update.
Seems to be less hassle than uninstall, reinstall, etc..
Engineering Innovation, Inc. - IronCAD Reseller
Cedar Rapids, IA