The Windows 7 Upgrade Option is available through participating PC manufacturers on selected PCs and through Microsoft on qualifying purchases of the Windows Vista packaged product. The Windows 7 Upgrade Option applies to Windows Vista Home Premium, Business, and Ultimate editions. Your Windows 7 upgrade will be to the comparable version: so you'll get either Windows 7 Home Premium, Windows 7 Professional (the upgrade to Windows Vista Business), or Windows 7 Ultimate, respectively. The Windows 7 Upgrade Option program runs from June 26, 2009 through January 31, 2010. Individual manufacturers may choose to offer the option for a shorter period on their PCs. Offer details, prices, and upgrade delivery methods will vary. For details for new PC purchases, please check the manufacturer's web site.