If it's still bad, then the only thing is to do is format your system and install windows and all that again.
I had same problem with one of my programs. What i did is install crap Cleaner (http://www.ccleaner.com/) Once you installed it open it and go to the tools tablet (on the left). Then find the program you want to uninstall clcik on it then click run unintall on the top right. If that dosent work then right click on the program name and click on delete entry. And you should run the cleaner it self while your at it i cleard around 9GB of crap off my computer with it.
it didnt work for the trial. >_______> Ill try installing the full version which is what i wanted first of all. I bought the full version of CS2 and it gave me a weird error Ill try installing it later.
It's because your trying to uninstall the Trail i had problems with it, i formatted PC, i now have the proper copy.
I dont want to format. I have too much stuff like around 100gb and it would be a pain to back up and reinstall.