Carefully enter your 25 character Windows 7 product key
On the validation page you'll first want to make note of the Reference ID number at the top of the page. (I've blurred the number in this screen shot.) Then, you need to enter the 25 character Windows 7 product key from the machine that you are upgrading. After you do, click the Continue button.
Credit: Images by Greg Shultz for TechRepublic
Greg Shultz is a freelance Technical Writer. Previously, he has worked as Documentation Specialist in the software industry, a Technical Support Specialist in educational industry, and a Technical Journalist in the computer publishing industry.