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.
Windows license keys
Steven has several computers with Windows 7 SP1 and Office 2010. He wants to know if he can buy a Windows 8.1 retail key and then downgrade to Windows 7 for another computer. Leo says no. He'll have to use Windows 8.1. If his computer has an OEM copy of Windows, then he should go to his PC maker and tell them he'd like to buy Windows disks for his computer. They should give him a license for Windows 7. He could also just wait. This summer, Windows 10 will be free to everyone running Windows 7 and above. Then he won't have to deal with it.