The motherboard is working properly, the sound is correct, the screen quality is good, the buttons are comfortable to hit the fan is not too noisy when operating at maximum. Too bad the screen size is slightly lower in height to my old PC (also 17 'with more height and less in width). As for locking the keypad, it must be done at every logon and it is unpleasant because if we have a numeric keypad is that it intends to use each time (otherwise we take a model 15 ' ). No light for the Num Lock is also a small weak point. I'm not talking about Windows 8 operating system (it takes time to adapt and expect not to find updated drivers for their printer 2 years old for example ...) because there is no Samsung not in question. Although seen as the PC power cable that does not fall from office when it is removed, it remains on the desktop with the weight of the small food box. I do not regret my purchase.