Norton360 no protection againts YONTOO!

I have got yontoo infection although I am running N360. I ran scan and it did not find or identift it.

I got a pop up message that NORTON has protected my computer and removed it!

NORTON DID NOT.PROTECT AT ALL against yontoo ? Why?

What can I do to remove yontoo and to protect against it? which products do I need in addition to Norton.

Someone mention AVG? Has any one got experience? Is Norton protecting as it claims? Why not?