Microsoft Corp.’s Windows Vista operating system (OS) does not have the best reputation among recent versions of Windows. Nevertheless, it will remain on sale for over a year after the release of next-generation Windows 7.
Under the Microsoft Support Lifecycle policy, Windows desktop licenses are available for four years after general availability in all standard product distribution channels (e.g. direct OEM, system builders, retail, and volume licensing programs via licenses or via downgrade rights). Licenses will continue to be available through downgrade rights available in volume licensing programs after end of general availability.
Microsoft Windows Vista was released in late January, 2007, hence, it will be available for purchase at least till January, 2011.
Microsoft is also projected to continue supporting consumer versions of Windows Vista (Home Basic, Home Premium and Ultimate) until 2012, five years after general availability; business-oriented versions of Windows Vista (Business and Enterprise) will be supported till 2017, ten years after general availability.