before the old timers start rolling their eyes, I have searched, and read, the entries on this subject, at least as many as I could. None of them addressed this issue;
this is not really a problem with CCleaner, but, I believe, a problem that CCleaner is locating with certain software, hence I don't expect an answer, just looking for information and ideas.
OK, on running CCleaner Registry Integrity test, I get 2 specific Unused File Extensions entries. The problem is, the files are created by current, valid, and installed commercial software. The programs have not been uninstalle