Microsoft is currently preparing to unveil a pre-release version of Windows 8 next month.
Microsoft’s president of the Windows Division, Steven Sinofsky, revealed on Monday that the company would supply a “pre-release version over the coming months”, widely expected to be made available at BUILD next month. Chinese site PCBeta revealed an 8064 build of Windows 8, built on August 6. The build is part of Microsoft’s preparations for its BUILD conference next month.
PCBeta also posted a setup screenshot that indicates the build is a “Developer Preview” instead of a beta. Microsoft had been expected to supply an early beta copy of Windows 8 during BUILD, a schedule that would mark a shift from the previous Windows 7 development cycle. Microsoft originally supplied a developer preview build of Windows 7 at its PDC 2008 conference before releasing a public beta version at CES 2009. It appears from the recent builds that Microsoft is preparing a similar development cycle for Windows 8, which could indicate a public beta offering at CES 2012.
Microsoft revealed its new tablet interface in June. The interface puts touch at the forefront using the company’s familiar Metro design of live tiles. Microsoft is expected to detail Windows 8 in full at BUILD. A final version of Windows 8 is expected in mid-2012.

Windows Developer Preview build