yes avast is stopping you from disabling avast, as any good security program would do. You're trying to clean everything the registry section has found. please read my signature.
Thanks for your speedy reply. I have been using Ccleaner for thousands of years, well, it seems like it, and I have never had this problem. Why is it happening now?
Avast probably started to not advertise its links to that registry entry so it began to start to show in the unlinked registry items (just a guess, I don't use Avast and never clean reg entries having to do with any installed security products (or really any installed product at all but especially security))