AE 7.0 Installation Problem

Earlier today I was reinstalling my old version of Adobe Creative Suite Production Studio Premium on a new workstation. Very early in the process I got the blue fatal error screen. Apparently enough of the After Effects installation completed as to make my system think that AE is installed. I can’t uninstall it so that I can start the process from scratch. When I put the first install disk in it tells me that After Effects is already installed and that it will not be modified. I can’t run a repair on the install and I can’t seem to uninstall the application completely. When I try to uninstall I keep getting the message, “uninstall wizard was interrupted, uninstall incomplete”. Does anyone have any thoughts?