CCleaner install/uninstall

I have had Ccleaner since 2011 & ran it manually. Recently I installed a trial version of CClearner to see if I want to buy or not. I am unable to use it, I get registry errors and can not open. I went to programs to uninstall and the progress frreezes after a few minures. I have left it running for hours and had to manually shut it down. As of now I am unable to run the program or uninstall. I am running Vista Home Premium on a Sony Vio laptop. Any information as to how fix my problem will be most appreciated.

Thanks,

Jessegirl101

There is no trial version, to my knowledge. There is a free version, but not a trial. What registry errors do you mean you get. What cannot open? Did you get ccleaner from piriform.com?