Buy Windows 10 Professional Product Key - get a genuine win 10 pro retail key and receive it via email for activating both 32-bit and 64-bit devices. Windows Description: This activation key can be used to activate both Windows 10 Professional 32/64 bit. If you already don't have Windows 10 installed you can download and install it for free from Microsoft's official website and after installation, you can use the code received from us to activate it and access more premium features of your Windows.