After I ran the CCleaner Pro and removed recommended items to clean and after I ran the CCleaner Registry cleaner I ran Norton SmartClean, and at the advanced Issues (which is not in my Norton subscription - I can run it, but not fix them without moving the subscription up) Norton says that I have 630 broken registry keys and 10688 Mb of clutter. The clutter is small, but how can I have so many broken registry keys according to Norton. Did CCLeaner miss those keys or are they nonexistent? Are the test run by each that different? Who do I trust?