I don't let MS do automatic anything on my windows box. I only use that box for a couple of apps, but when I need them, I really need them and can't afford to be blindsided by a box that won't boot.
I pick and choose the updates I apply and only then after they've been out in the wild for a month or so. I'm not going to let microsoft do any alpha/beta QA testing... errr... I meant "automatic updating," on my production box.