The March copy of PCA tips RegCleaner (p.163) but Jouni Vuorio has now developed jv16 PowerTools (still free)from click here described as:
"jv16 PowerTools is basically the tool for your computer. Until now your computer might have been the one who was in charge, but with jv16 PowerTools you can take control back. The program contains all the tools you need for cleaning, controlling and tuning your computer. Including a registry cleaner, duplicate file finder, temp file finder and much more!