Windows 7 Activation Error: Product Key invalid

If you receive an error indicating that validate your product key when Windows 7 is not installed, it can be for the following reasons: 

You may have mistyped your product key. This new deal to write. 

You have a product key that Windows 7 is the version that is installed on your computer may not match the use. This version of the product to ensure that you are trying to activate the key check. You Service Pack 1 (SP1) for Windows 7 a copy of Service Pack 1 without product key to activate Windows 7 can be used. 

The product key for an improved version of Windows 7 and earlier versions of Windows installed on your computer when Windows 7 was not. Installing an upgrade version of Windows 7, Windows Vista or Windows XP must be installed on your computer. If you formatted the disk before starting the installation process, you can update the product key to activate Windows 7 will not be able to use. Windows 7 to activate it, you need to install previous versions of Windows, Windows 7 and then reinstalled. To help with the activation process, visit Microsoft Support. 

0xC004F061: Activating Windows 7 errors more information, see Windows 7 activation error. 

We suggest that you run Windows 7 with the current version of your Windows installation. If you want to reformat the hard disk, and using an updated version of Windows 7, the computer starts, Windows 7 installation disk or USB flash drive, click Custom (advanced) need to use the will and then , click Drive options (advanced). 

To check your product key, equipment or within the Windows product package or label key confirmation e-mail to see if you have purchased online and downloaded Windows 7. label product key Microsoft web site for examples. 

If you still cannot find the product key you have to buy a new one, Windows can be activated. You Windows 7, a product key that you can use the same version that you can buy an extra copy. For more information, see Windows 7 Looking for a new product key.