MANY people have counterfeit installs - very few of them actually know it!
A large proprtion of counterfeiting is done b vendors who can make a quick buck by buying/building OS-free machines, and installing 'Ultimate' to unsuspecting purchasers.
Many machines from the area in which this one seems to have come were actually shipped with Home Premium - but either Vistalizatorr, or a counterfeit Ultimate was installed by the shop, to allow use of multiple languages. Some of these machines were bought in the Duty-free stores in airports"
People are entitled to assume when they purchase something in what appears to be a legitimate and reputable store, that the product is legitimate. Whne this turns out not to be the case, it can be a legal minefield to sort out liability - and this is what many shady vendors rely on for their profits.
When the purchase and ownership are in different countries, any hope of recompense by normal means often goes out the window, along with the purchaser's cash.