Refuse to accept Windows license and get a refund?
I seem to remember a while back that someone bought a Dell laptop with XP pre-installed and refused to accept Microsoft's T&Cs. After a bit of a struggle with Dell he was refunded the price of the Windows license and either installed Linux or used a Windows disk he had already paid for.
I'd be interested to know if you could do this with the Advent and bring it's price down further. Annoying PC World would be an added bonus ....