This product includes one Windows 10 Home key for 1 PC. Windows 10 Home is available for PC in both 32-bit and 64-bit versions, but not for MAC. Windows 7 Professional/Ultimate and Windows 8.1 Professional (incl. WMC) CANNOT be directly upgraded to Windows 10 Home by changing the product key in the Windows system. You can buy this Windows 10 Home edition and perform a clean installation, or buy our Windows 10 Professional for a direct upgrade. Operational hours: 10:00 - 17:00 WIB We apologize & please understand if order responses are slow because the admin is human, not a robot. If you are assisted outside of those hours, it means the admin is ON.