Obviously this isn't hard to figure out, you just need a proper win 7 key.You must purchase a qualified Windows 7 PC between June 2, 2012 and January 31, 2013 to be eligible for this offer. The last day to register and order your Windows 8 upgrade is February 28, 2013.
The offer is for customers (e.g. home users, students, and enthusiasts) who purchase a qualified PC. A qualified PC is a new PC purchased during the promotional period with a valid Windows 7 OEM Certificate of Authenticity and product key for, and preinstalled with:
Windows 7 Home Basic;
Windows 7 Home Premium;
Windows 7 Professional; or
Windows 7 Ultimate.
The promotional price is limited to one upgrade offer per qualified PC purchased, and a maximum limit of five upgrade offers per customer.