[Lupin]

The DPD delivery driver would surely know that the computer was in there?  The computer weighs 10kg!!

The word of the driver doesn’t mean anything, just like it doesn’t when you execute the DNA method.

So should I just say it came missing the computer? Also, its from Currys and was shipped by DPD and they are both difficult to deal with.

Yes, say that the package arrived without the computer, ensure clarify that there were evident signs of tampering, when they start an investigation they'll check the couriers photo and see that the package has been tampered with.