Transition,
Here are the specs of your new HP Pavilion g7-2269wm Notebook Computer. According to the specs, this model came from the factory with Windows 8 installed. Because Windows 8 came with this computer, you don't have a Windows 7 key to use and will need to purchase one if you wish to install Windows 7. The information and download links are valid and usable, you are just lacking the Windows 7 key. If you purchase a legit Windows 7 COA with an unused Windows 7 product key, you can use the information provided to create an installation disc and install the product.
Your warranty would still be valid, however you would need to restore the computer to a factory like condition to receive service.
Please send KUDOs