Run the install again.
If the error recurs, then run CS Cleaner Tool (http://www.adobe.com/support/contact/cscleanertool.html) and remove all products, then reinstall.
Run the install again.
If the error recurs, then run CS Cleaner Tool (http://www.adobe.com/support/contact/cscleanertool.html) and remove all products, then reinstall.