If you want to turn off avast,right click on the blue ball with a avast a on it.A window will pop up and click on stop provider.That will turn it off.To turn it on again right click on the a ball and click on resume provider.But I could not say if you need to turn off avast to burn a c.d.Have you tried burning a c.d.with avast running.I mean I would feel a bit vulnerable burning off a c.d.on the net without protection.