Buy a pack Office 2010, blister with MS and hologram label complying with MS products. After a few months of use, blocking software suite Office Professional. Following complaints to Microsoft Europe, here's the explanation: "Your key is part of a collection of keys MSDN / TechNet / BizSpark that has been illegally distributed on the black market So you are a victim of piracy We advise you to contact.. your dealer and inform him that he sold you a pirated key. Unfortunately we are not in the position to provide you a new key. " THANKS AMAZON MARKETPLACE!