If you receive an error "0xc004f061" When you try to activate Windows 7 o'clock, you are using the Windows 7 Upgrade product Key instead of the WINDOWS7 installation activation key
The Windows7 activation product key is divided into two types, activating the key and upgrading the key, activating the key refers to the key that is entered directly after installing WINDOWS7, and the upgrade key refers to the activation key of upgrading from a lower version of Windows such as XP to Windows7
To install an upgraded version of Windows 7 and activate it by upgrading your product key, you must have Windows Vista or Windows XP installed on your computer.
If you format the drive before you start the installation process, you cannot activate Windows 7 with the upgrade product key. To activate Windows 7
So if you are using the Product upgrade key, you must first install the previous system, and through the previous activation code, after the installation of Windows7 Click Upgrade, not a custom way to install!