The problem with a guarantee is that it is completely separate to your statutory rights (which apply across the EU). A guarantee is a 'gift' from a manufacturer and, as such, that manufacturer is entitled to determine their own conditions. (For example, it's perfectly lawful for a guarantee to say that it's only valid if you return the goods, in person, to the factory in Japan, between the hours of 0301 and 0302 on the third Thursday after a full moon).
However, while many manufacturers will refuse to honour guarantees on 'grey imports' (i.e. on goods which were never actually intended for sale in the country in which they were eventually purchased), that's rarely the case with goods which were bought 'through regular channels'. Most manufacturers will honour such guarantees worldwide (or, at least, in any country where they have arrangements for servicing their own products).
So Samsung may well agree to honour the guarantee.
However, depending upon how long ago you bought the laptop, Curry's may well still have a statutory obligation to fix your laptop (even if that means that they'll have to pay for shipping to and from the UK). You're consumer rights, with a retailer, exist throughout the whole of the EU.
Chris