Originally Posted by nikon133
I missed to see any info on MS plans to discontinue Vista so quickly. It does make sense having only one new OS to support, though... but MS has a history about announcing discontinuation and prolonging product's life afterwards.
Even if Vista is taken off store shelves tomorrow, Microsoft has commited to a minimum of 5 years of mainstream support (security and non-security hotfixes) for all of its consumer products. (Or 1 year after the release of the product's successor, whichever works out to be longer.) That means all editions Vista will be continue to have full support until at least 2012 (2007 general availability + 5 = 2012).
Microsoft's business and development software (including the Professional, Business, and Enterprise editions of the Windows operating system) has an additional 5 years of extended support following the end of its mainstream support, during which time security-related bug fixes will continue to be developed. (Or 2 years after the release of the product's successor, whichever works out to be longer.) That means the business editions of Vista will continue to have security-related support until at least 2017 (2007 general availability + 10 = 2017).
Heck, Windows 2000's extended support lifecycle will only just be coming to an end in 2010 (2000 RTM + 10 = 2010).
Windows XP's support has been extended beyond the normal timeframe, likely due to delays in getting its successor to the market and slow market acceptance of that successor. But even if it hadn't been extended, XP Professional's normal support lifecycle would still have lasted until least 2011 (2001 RTM + 10 = 2011).