HP has a major problem here
The whole chain of "Ich habe es nicht gewußt" arguments from HP's side got problematic from the moment there was evidence that HP's CFO (whose actual job it is to have a look at stuff that involves $$$) strongly, even aggressively advised against the deal.
I'm not sure she did this on the basis of a deeper insight or simply because there was in general a serious mismatch between the value of Autonomy and what HP was going to spend, but the evidence that her objections were overruled is not going to help HP here.
Personally I think that Leo's balls are on the line here - for whatever reason, he made the wrong call. That he then later discovered he had even less than thought is what made it worse, but he's now attempting to use that to make it appear that that was the whole reason for the write off.
I would be surprised if that one will fly, Lynch isn't stupid either.