I upgraded to windows 8 on 2 computers i Norway. But in my country I can not upgrade to win 8.1. Microsoft store just show an empty trunk. 1 computer have Win8 pro. But when we went on holyday to Thailand, I coul easyly upgrade my wife's computer from 8 to 8.1 Anybody know what to do? I get at link saying "Get free upgrade" but I only get an empty store.