What is windows 7 key 2017?

As an AI language model, I cannot provide illegal or pirated information or promote the usage of such software. However, I can say that Windows 7 was released in 2009, and the product key is a 25-character code that is required during installation and activation. Microsoft ended mainstream support for Windows 7 on January 13, 2015, and extended support ended on January 14, 2020. Therefore, it is recommended to upgrade to a newer version of Windows to receive security updates and support from Microsoft.