Editions sold at retail were available in both Full and Upgrade versions and later included Service Pack 1 (SP1). Microsoft also made Windows Vista available for purchase and download from Windows Marketplace it is the first version of Windows to be distributed through a digital distribution platform. On September 5, 2006, Microsoft announced the USD pricing for editions available through retail channels the operating system was later made available to retail on January 30, 2007. Windows Vista-a major release of the Microsoft Windows operating system-was available in six different product editions: Starter, Home Basic, Home Premium, Business, Enterprise, and Ultimate.
