if you can rollback your computer to a time before you tried the trial/crack, that would give you your best chance at a clean start.
if that fails, try uninstalling and running the cleaner (http://www.adobe.com/support/contact/cscleanertool.html) and then reinstalling.
unfortunately, there's no way to know what information the crack tried to add and where it added it so there's no guarantee anything other than the first suggestion will work.