mftutil never stops, Avast 2015 version 10.3.2225

I have mftutil constantly running and banging away at the disk. It’s run for hours, and shows no sign of stopping. I’ve searched for a solution, but the suggestions to disable NG don’t apply, that doesn’t appear in the options.

How do I stop this thing, or is the only solution to change AV products?

Still running overnight, time to change AV products!

Problem solved, I’m going to try Panda…