I will quite confidently say that it is physically impossible for any airliner, let alone a modern, safe type like the A330 to 'fly itself into the ground' as you so succintly put it. [omissis] Trust me, I do IT support.
Hmmm, tell that to the Bilbao A320 crew...
ASN Aircraft accident Airbus A320-214 EC-HKJ Bilbao Airport (BIO)
This is going a bit OT perhaps, but computers most definitely "do things wrong" occasionally, sometimes because of programming inadequacy (system unable to deal with unforeseen circumstances that the software engineers had not catered for), other times I have seen autopilots/FMCs in "modern, safe types" like the A321 I flew for years (or the B744 I fly now) do absolutely inexplicable things, almost like a computer "brain f@rt". Trust me, I fly them!
Might not have anything to do with this accident though.
MD