I'd be spitting feathers by now. !!
I am no authority but I would have thought that any software that is specifically included in the product description would be at least partly under warranty, even if it is a 'refer to manufaturer' type.
However, if he is installing software illegally without paying for it I would expect him to act like this. You could threaten reporting him to FAST (Federation Against Software Theft), that might have the desired effect.
The fault looks more like a hardware problem to me anyway but I am a programmer and they tell me we are therefore biased that way.

Paul