A note to the defect of its predecessor. An acquaintance, who works as an engineer in this field, has informed me that one should be placed no CD / DVD in the laptop drive as a user, as they are known to be firmly connected to the axis. You transport the laptop now, this is inevitably exposed to shocks or G-forces acting laterally on the drive axle. Put a CD / DVD created because sometimes imposed, not lead to fracture of the axle, but change the situation so that an error-free scanning is no longer possible. That's what happened with me.