Any upgrade program for Windows 7 expired by early 2010, some months after the release of Windows 7.
If you wish to obtain Windows 7, you will need to purchase a copy.
Important Links: Global Support Pages | Knowledge Base Articles Remember to mark posts that resolved your issue with Accept as Solution. You can even mark multiple posts in a single thread. This will make it easier for others to find the same information. Use the Give Kudos button to offer a thumbs-up for good post content and a pat on the back to the author.