This product includes one Windows 10 Home key for 1 PC. Windows 11 Professional 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 purchase this Windows 10 Home edition and perform a clean installation or buy our Windows 10 Professional for a direct upgrade. **Operating Hours:** 10:00 AM - 5:00 PM WIB We apologize and kindly ask for your understanding if order responses are delayed as the admin is human, not a robot. If you are served outside these hours, it means the admin is currently ON.