Your software was never properly installed and the programs are attempting to run a "post-install install". This can happen when you serialize trial versions and additional components become avialable that were not included in the trial due to licensing restrictions. The simpel answer is: Insert that disk, run as admin and let it do its thing. Otehrwise consider using the Creative Suite Cleaner Tool and starting over.
Thanks for the heads up Mylenium. I'll give it a try.