Windows 8 has been released to PC OEM and manufacturing partners, and it will be available to end users on October 26, 2012. For more detail read Steven Sinofsky’s blog post “Releasing Windows 8 - August 1, 2012.”

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You can download Windows 8 Release Preview (beta) here. Developers can download Windows 8 Release Preview and Visual Studio 2010 RC here and get started with developing Windows 8 applications.