Windows 7 can not be activated without providing a genuine valid product key, which is being activated by Microsoft’s internal product key activation method. You need to provide the product key and validate it before using this latest operating system from Microsoft. However, many people face problems during Windows 7 activation on their systems even after purchasing a valid Windows 7 product key from Microsoft’s online or offline distribution partners. This post will tell you the common errors during Windows 7 installation and the ways to fix those problems.

Many people face “your product key is not valid” error code while trying to install Windows 7. To get rid of this problem, follow the below possible reasons and their solutions :

* You might have entered incorrect product key. Try retyping it correctly
* Your product key doesn’t match the version of Windows 7 that you are installing on your system. Double check the Windows 7 version and the product key number
* The product key is for an upgrade version of Windows 7 and you are trying to enter this product key on a computer where no previous Windows versions were installed. Do note that in order to use any Windows 7 upgrade version product key, you need to have either Windows Vista or Windows XP installed on your computer.

You can upgrade XP to Windows 7 or Windows Vista to Windows 7 by entering the Windows 7 upgrade product keys. Else, you need to purchase genuine and valid Windows 7 product key to get rid of the “product key is not valid error” error during installation.