Dear friend,This is Jesscia from randian company, which is a Microsoft certified partner. All license we sell is new and certified by Microsoft with original 100% online activation .I can provide you with Microsoft key, such as Office 365, Office 2019 Pro Plus, Office 2019 Home and Student, Office 2019 Home and Business, Office 2016 and so on.I can also provide you with the computer operating system keys, such as Windows 10 Pro, Windows 10 Home, Windows 8.1, Windows 7 and so on.I also have Windows Server 2019, Windows Server 2016, antivirus software and so on.please give me your email and Whatsapp,I will give you product list.JessciaWeChat/Skype/Whatsapp: +86 130 0753 0879