Isn't the checkbox already ticked though? I'd say that's opt-out. The user must take direct action to avoid telemetry.

It's not a check box, its a button choice ("Share diagnostics" "Don't Share")

It's pretty explicit in intent.

	▲	walthamstow 16 minutes ago \| parent \| next [-]
		My mistake, I misremembered. s1mplicissimus makes a very good point. What I do remember is it's designed to capture telemetry opt-in of people who aren't savvy and just click next, next, next.
	▲	s1mplicissimus 28 minutes ago \| parent \| prev [-]
		Usually, there's a default blue bordered button and a non-highlighted grey one. Any chance the default blue button says "Share diagnostics"? Because that would still make it an opt-out