well Ccleaner has done what windows disk cleanup couldn't. I wonder whether using this function is meaningful at all. DLL files still there, they may be still in use.
Found something peculiar, though. Ccleaner showed the presence of lots and lots of registry keys with different problems. Was going to clean them up all, but decided to search on the net for more data regarding keys like muicache, and found a wealth of information about the convenience of deleting them. Some say it must be done, while others say it shouldn't: http://preview.tinyurl.com/otq5fkf
It is somewhat confusing that there is no general agreement as to things like this should be deleted or not.