Michael wants to know if Leo knows anything about Windows Pro N. He bought a refurbished computer with it. Leo says it's a European version of Windows. Michael also says it's a trial version of Windows. Leo says the guy Michael bought the computer from, didn't want to pay for an official Windows license, and eventually, that version of Windows will stop working. Michael will probably be able to upgrade on top of that version, and you can buy an OEM version of Windows from NewEgg for about $100-150. Get the 64-bit version.