I finally bought mine as a Demo, following the advice of another photographer on the Leica Forum, who's been running it since 2 weeks now like a dream.
We bought the same machine from the same dealer.
His received instantly from HP UK an amended 12 months warranty reset from date of purchase.
Mine, in Belgium, is still waiting, because some gentleman here, confessing he "does not know nothing about these contracts" decided that, to him, "this machine has been used".
After 10 days of sadly confused phone talks, sending all documents from the reseller proving I'm in my own right, I demanded officially to receive a case reference number, to which this representative told me "I don't see what you will do with that".
I'm escalating the case now, through HP UK, which has been quite responsive, immediately sending me two mails of detailed reply, when HP Belgium never replied to my mails to them.
Unbelievable.